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Investigating Growing Inequality in Mozambique

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In this paper, we investigate the long‐term trend of consumption inequality in Mozambique. We show that an imbalanced growth path disproportionally benefited the better‐off and caused increasing inequality, especially in more recent years, curbing the necessary reduction in poverty. Using a regression decomposition technique, our results suggest that this trend was strongly associated with the higher attained education of household heads and with the changes in the structure of the economy (with less workers in the public and subsistence sectors). The trend was, however, mitigated by the tendency for the higher level of attained education and the smaller public sector to become associated with less inequality over time. These results point to the importance of accelerating the expansion of education and improving the productivity of the large subsistence sector to lower inequality in line with the sustainable development goals.
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South African Journal of Economics Vol. 0:0 Month 2019
doi: 10.1111/s aj e.12215
1
INVESTIGATING GROWING INEQUALITY IN
MOZAMBIQUE
CAR LOS GRADÍN*,† A ND FINN TARP
Abstract
In this paper, we investigate the long-term trend of consumption inequality in Mozambique. We
show that an imbalanced growth path disproportionally benefited the better-off and caused
increasing inequality, especially in more recent years, curbing the necessary reduction in poverty.
Using a regression decomposition technique, our results suggest that this trend was strongly
associated with the higher attained education of household heads and with the changes in the
structure of the economy (with less workers in the public and subsistence sectors). The trend was,
however, mitigated by the tendency for the higher level of attained education and the smaller
public sector to become associated with less inequality over time. These results point to the
importance of accelerating the expansion of education and improving the productivity of the large
subsistence sector to lower inequality in line with the sustainable development goals.
JEL Classification: D63, I24, O55
Keywords: Inequality, Mozambique, decomposition, RIF
1. INTRODUCTION
Mozambique was the poorest country in the world in 1992, when the war that followed
from the early 1980s after independence from Portugal in 1975 came to an end. Per
capita GDP was US$354 (2011 PPP) and poverty was widespread. Economic reforms
were initiated in 1986, and recovery followed with rapid economic growth from the mid-
1990s onwards, reaching a GDP per capita of US$1,128 in 2016. Yet the country still
ranks among the poorest in the world.1
Economic growth brought a substantial reduction in poverty levels. This is so whether
poverty is measured with monetary or non-monetary indicators, as reported, among
others, by the last two national poverty assessments (MPD/DNEAP, 2010; MEF/DEEF,
2016). Poverty, however, continues to be high, in part, because of the persistence of eco-
nomic constraints (i.e. inadequate education, trade and transport systems). They slow
1 GDP data from the World Bank, International Comparison Program database (http://data.
worldbank.org), accessed on 11/08/2017.
* Corresponding author: United Nations University World Institute for Development
Economics Research (UNU-WIDER), Katajanokanlaituri 6 B, FI-00160 Helsinki, Finland.
E-mail: Gradin@wider.unu.edu
United Nations University World Institute for Development Economics Research
(UNU-WIDER), Helsinki, Finland
This is an open access article under the terms of t he Creative Commons Attribution-NonCommercial-ShareA like License, which
permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and the content
is offered under identical terms.
© 2019 UNU-WIDER. South African Journal of Economics published by John Wiley & Sons Ltd on behalf of
Economic Society of South Africa.
South African Journal
of Economics
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Economic Society of South Africa.
down further poverty reduction compared with countries, like Vietnam, which have
achieved a more pro-poor growth pattern (Arndt et al., 2012).
The sustainable development goals have made the reduction of poverty in the develop-
ing world a priority, but also the reduction of inequalities to guarantee that no one is left
behind (Goal 10). Sub-Saharan Africa is among the most unequal regions in the world
and a puzzle for traditional development economics models and the popular Kuznets’
inverted-U hypothesis because it is also the least developed. This, however, implies that
there is a risk that inequality increases even more during the initial stages of develop-
ment of the non-subsistence sector in a region with predominantly resource-led growth.
Higher levels of inequality could harm the stability of an extremely fragile region and
undermine the effectiveness of poverty reduction strategies.
The scarce evidence for relative inequality in this region points at no clear pattern in
the last decades. Inequality does not seem to have changed much on average (see review in
Alvaredo and Gasparini, 2015), but is associated with large heterogeneity in levels, trends
and explanatory factors depending on the initial conditions and how inclusive economic
growth was, as recently pointed out in a UNDP report (Odusola et al., 2017). This report
has also summarised the main driving forces of inequality in the region: (i) a highly dual-
istic economy structure, with a large informal or subsistence economy cohabiting with a
small elite working in the formal economy (i.e. public, international and resource sectors);
(ii) the high concentration of land and physical and human capital in certain groups
and regions; and (iii) a limited distributive capacity of the state, leading to the “natural
resource curse,” the urban bias of public policy, and ethnic and gender inequalities.
The last two national poverty assessments in Mozambique documented an increase in
consumption inequality in this country. While Mozambique’s overall initial level of
inequality was high according to world standards, this was not so given the African con-
text, except for the urban areas (Fox et al., 2005). Inequality slightly increased between
the first two post-war households budget surveys (1996/97 and 2002/03) to later remain
barely constant (between 2002/03 and 2008/09).2 However, a much larger increase in
inequality was recently found between the last two surveys (2008/09 and 2014/15).
National poverty assessments emphasised evidence of underreporting in food consump-
tion by the poor that might imply that the actual level of inequality is lower than reported.
But inequality could also be significantly higher if we take account of underreporting
among the relatively better-off (Arndt and Mahrt, 2017) or how the expenditure structure
differs for these households as compared with the poor (Arndt et al., 2015).
This paper contributes to the growing literature on inequality in Mozambique and,
by extension, in sub-Saharan Africa. We analyse the long-term trend in inequality in
Mozambique and characterise its distributional pattern. We also identify some of the
underlying drivers using a regression-based decomposition technique based on the
Recentered Influence Function of the Gini index. In line with Gradín (2016), we first
investigate the role of several household characteristics on inequality in every year. Then,
we construct a counterfactual distribution in which we combine the average characteristics
2 Elbers et al. (2005) showed that in Mozambique, like in Ecuador and Madagascar, most in-
equality in 1996/97 was within the small administrative units. The change in inequality between
1996/97 and 2002/03 has been analysed, for example, by James et al. (2005) and by Fox et al.
(2005), using decompositions by different population subgroups.
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of the initial year while keeping the impact of these on inequality that prevailed in the final
year. Using this counterfactual, we decompose the overall change in inequality over time
into two terms. One is the change in inequality that can be attributed to a change in the
composition of the population by characteristics (characteristics or explained effect). The
other is the change in inequality that can be attributed to the change in the relationship
between these characteristics and inequality (coefficients or unexplained effect). The results
point in the direction that there was a robust increase in inequality, driven by an unbal-
anced growth pattern that has disproportionally benefited the better-off. This growth pat-
tern is characterised by the emergence of a non- subsistence economy in Maputo and other
urban areas, in a resource-based country, with a shrinking public sector, the expansion of
education and the emergence of a small but highly educated elite. The results show that the
increase in inequality can be mostly accounted for by this compositional effect rather than
by a structural change in terms of how household characteristics affect inequality.
In what follows, the next section describes the data and main variables used while
Section 3 discusses the latest trends in inequality. Section 4 introduces the decomposition
methodology while Section 5 presents the empirical results. The last section concludes.
2. DATA AND VARIABLES USED IN THE ANALYSIS
The empirical analysis is based on the four nationally representative households budget
surveys collected by the Instituto Nacional de Estatística (INE) after the end of the post-in-
dependence war: the Inquéritos aos Agregados Familiares (IAF) for 1996/97 and 2002/03,
and the Inquéritos ao Orçamento Familiar (IOF) for 2008/09 and 2014/15.
We use daily real per capita consumption as our main indicator of individual well-
being, although nominal consumption will also be used for robustness analysis.
Consumption is usually preferred to income in inequality analyses in developing coun-
tries, especially in the sub-Saharan region. We use here the same indicator constructed
for the Fourth National Poverty Assessment MEF/DEEF (2016) based on the PLEASe
methodology (see Arndt et al., 2017a for details). In a first normalisation, current real
consumption is obtained by adjusting nominal consumption in each survey to correct for
seasonal and spatial variation in prices using price indices computed separately for 13
geographical regions. We proceed with a second normalisation to produce real consump-
tion in constant terms over time. We divide current real consumption by the contempo-
rary official poverty line (which is also expressed in contemporary real consumption
terms). This deflator allows us to describe the change in household purchasing power of
a (flexible) basket of basic food and non-food goods over time. Note that this second
normalisation does not affect relative inequality measures because the contemporary
poverty line is the same for all individuals within each survey.3
3 The Consumption Price Index in Mozambique is only estimated using prices in a few urban
areas. Poverty lines in contemporary currency (in parentheses 2011 PPP using the World Bank GDP
deflator) are MZM 5,502 (US$1.13) in 1996/97, MZM 8,307 (US$0.95) in 2002/03), MZN 17.93
(US$1.37) in 2008/09 and MZN 29.19 (US$1.76) in 2014/15. The use of a common deflator
(regardless of the level of consumption) is a rather conservative approach. Arndt et al. (2015) have
recently shown that the increase in inequality between 2002/03 and 2008/09 was 0.030 Gini points
higher when using a composite household-specific price index that is sensitive to the differences in
the structure of consumption of the relatively well-off and the poorer households.
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IAF/IOF surveys have been the main source for the analysis of well-being in
Mozambique. They have, however, suffered from a variety of limitations in the collec-
tion of data, shared with other large developing countries and aggravated by the lasting
consequences of the conflict, such as the lack of infrastructure, the presence of land
mines, market fragmentation, flooding in certain areas and the use of non-standard unit
measures. (Arndt et al., 2017b). The surveys are also associated with the well-known
problem of underreporting of food consumption that has been aggravated in the most re-
cent one. Initially confined to urban areas in the South, it is now affecting rural areas too
(MEF/DNEAP, 2016). This underreporting is in part related to infrequent purchases,
especially of rice and corn flour. Like most household surveys, IAF/IOF also suffer from
underestimation of top values due to the underrepresentation and/or underreporting of
consumption by relatively well-off households (Arndt and Mahrt, 2017).
In the first three surveys, we have information about consumption for a total of,
respectively, 8,250, 8,700 and 10,832 households interviewed once over four quarters.
They account for a total of 42,667, 44,083 and 51,177 individuals, respectively. The
design of the most recent survey is different. We have information for around 11,000
households that were interviewed one, two or three times between August 2014 and July
2015 (with a total of 11,505 households interviewed in the first quarter, 10,372 in the
second one and 11,315 in the fourth quarter). In this last case, we use the pool of house-
holds in the analysis (58,342, 50,770 and 55,198 individuals, respectively) to prevent a
seasonal bias (which is not present in the other surveys because the sample of households
was distributed in different quarters). The unit of analysis is always the individual, while
the income sharing unit at which individual well-being is determined is the household.
For that reason, individuals are attributed the per capita consumption and the charac-
teristics of their households. Standard errors are clustered within households and all
estimations used sampling weights.
To explain changes in inequality over time, we consider several characteristics of
households available in these surveys that may have influenced their consumption levels.
We account for economic opportunities varying by location using information about the
area (rural or urban)4 and province of residence (Niassa, Cabo Delgado, Nampula,
Zambezia, Tete, Manica, Sofala, Inhambane, Gaza, Maputo and Maputo City).
Demographic variables considered include the number of children (aged 14 or less) and
adults in the household, as well as the marital status (single, married, widowed, separated
or divorced), age (in brackets) and sex of the household head.5 We also considered the
education attained by the household head. Several variables accounted for the employ-
ment status of the household head. First, we used the head’s industry, distinguishing
whether the head is (i) employed in the non-subsistence sector, operationalised here as
remunerated work (not being a family helper) outside the primary sector; (ii) working in
4 The definition of urban area in 1996/97 is narrower than in the subsequent surveys. Consistent
definitions of area were used for comparing 1996/97 with 2002/03, and the latter with subse-
quent surveys. Maputo City is entirely urban and Maputo province is mostly urban (70%), while
the majority of the population is rural in the other provinces, with the urban population ranging
between 14% in Tete and 36% in Sofala (2014/15).
5 In the regressions, we will not use a few observations with unknown age and sex of the house-
hold head.
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the subsistence sector; and (iii) not employed.6 We also considered two dummy variables
indicating whether the head is self-employed or works in the public sector, respectively.
Finally, we included the employment rate of household adults (the number of employed
adults in the household divided by the number of adults, taking the value zero in few
cases in which there were no adults at all).
3. TRENDS IN INEQUALITY
The densities of real per capita consumption for the different years are displayed in
Fig. 1. Mean consumption values and several quantiles are reported in Table A1 in the
Appendix. Real per capita consumption increased by two thirds over the entire
1996/1997–2014/2015 period, corresponding to an accumulated average annual growth
rate of 2.9%. Yet this rate was not homogeneous in different subperiods. The average
annual growth rate was 5.2% between 1996/1997 and 2002/2003. Hereafter,
6 We also included a dummy to control for cases in which the household head was employed
while the industry was unknown (less than 1% in any survey). Compared with other options, like
not using the variable or removing the affected observations, this allows us to minimize the loss
of information (preserving all the information that is not missing in those observations).
Figure 1. Daily real per capita consumption: densities [Colour figure can be viewed at
wileyonlinelibrary.com]
Note: Daily real per capita consumption values, expressed in constant terms (deflated by
the contemporary poverty line).
Source: Authors’ calculations based on IAF/IOF.
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Economic Society of South Africa.
consumption remained almost constant until 2008/2009 (0.2%) to increase again at an
annual average rate of 3.3% until 2014/2015.7
Increases in real per capita consumption took place across the entire distribution. The
densities shifted to the right, consistent with the well-established reduction in the inci-
dence and intensity of poverty. The official poverty rate declined from 70% in 1996/1997
to 46% in 2014/2015: a sharp reduction until 2002/2003 (reaching 53%), a more modest
decline (from 52 to 46%) between 2008/2009 and 2014/2015 (see MEF/DNEAP, 2016
for a more detailed analysis of poverty). This was accompanied by an initial decline in
the intensity of poverty too. The median poverty gap, according to our own calculations,
declined from 43 to 35% of the poverty line in the first period, remaining at this level
thereafter.
The increase in real per capita consumption exhibited, however, a clear pattern dis-
proportionally benefitting the relatively well-off as shown in Figs. 2 (selected percentiles
in absolute terms) and 3 (relative growth incidence curves). This is in line with earlier
results (e.g. James et al., 2005 for 1996/1997–2002/2003), but was accentuated during
the last period. Growth in consumption was largest for the highest percentiles in both
absolute and relative terms. While real consumption grew by 73% for the 95th percentile
over the entire period, the median grew by 47%, and the 5th percentile only grew by
33%. There are different patterns across periods, though, with the highest growth for the
7 The closest per capita expenditure aggregate in National Accounts (i.e. households and non-
profit institutions serving households, constant 2010 US$) also shows a large increase over the
entire period, 79%, but with no stagnation in the middle one; the average annual rates were, re-
spectively, 4.9, 2.6 and 2.3% (http://data.worldbank.org, accessed on 06/09/2018).
Figure 2. Daily real per capita consumption: mean and quantiles [Colour figure can be
viewed at wileyonlinelibrary.com]
Note: Daily real per capita consumption values normalised by the contemporary poverty line.
Source: Authors’ calculations based on IAF/IOF.
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well-off occurring during the last subperiod. This inequality increase is also illustrated
by the increase in the p50/p10 and p90/p50 ratios (respectively from 2.2 to 2.4 and from
2.4 to 2.6), with the bulk of the increase in the last period. This unbalanced growth is
compatible with significant improvements at the very bottom in the first and last peri-
ods that contrast with the decline in their consumption during the intermediate period,
characterised by stagnation on average (Fig. 3).
The non-overlapping empirical Lorenz curves shown in Fig. 4, not surprisingly, reveal
an unambiguous increase in inequality in both periods of consumption growth
(1996/1997–2002/2003 and, especially, 2008/2009–14/15). Lorenz dominance was sta-
tistically significant in both periods (Table A9).8 Less obvious is the trend in the inter-
mediate period of stagnation in consumption (2002/2003–08/09). While the 2008/2009
curve crosses the 2002/2003 one from below around the 65th percentile, the cross is not
statistically significant (while the difference between both curves is statistically signifi-
cant only below the 13th percentile). This implies also an increase in inequality in this
period according to the Lorenz criterion. For the entire period, the most recent Lorenz
curve falls entirely below the earliest one, with the differential being statistically signifi-
cant at all percentiles.
The increase in inequality is corroborated using a variety of inequality indices, like
Gini, and the Generalised Entropy and Atkinson families, all of them consistent with
Lorenz dominance.
8 The 2002/03 curve is below the 1996/97 curve everywhere, but only with high statistical sig-
nificance (at 90 or 95%) in the upper tail. The 2014/15 curve falls below that of 2008/09 for all
percentiles, being statistically significant (95%) above the 7th percentile. See Table A9.
Figure 3. Daily real per capita consumption: (relative) growth incidence curves [Colour
figure can be viewed at wileyonlinelibrary.com]
Note: Daily real per capita consumption values normalised by the contemporary poverty line.
Source: Authors’ calculations based on IAF/IOF.
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The Gini index of real per capita consumption increased by 4.6% in the 1996/1997–
2002/2003 period, and by 12.7% in the 2008/2009–14/15 period, remaining constant
in between (−0.1% between 2002/2003 and 2008/2009), as displayed in Fig. 5 and Table
A1. The increase in inequality, as measured by the Gini index, over the entire period was
17. 8 %.9
Figure 5 shows the trend in the Gini index using four alternative well-being indica-
tors for the sake of robustness, with real and nominal consumption (no adjustment for
spatial and temporary variation in prices), and in each case with per capita and per adult
equivalent (using the square root of household members) – see Tables A1–A4 in the
Appendix. The Gini index is substantially higher when consumption is nominal instead
of real. This reflects that in Mozambique, as in other developing countries, geographical
differences in prices are substantial. It is slightly lower, however, when it is equivalised
instead of per capita. The Gini index for Mozambique follows the well-known U-pattern
with the level of economies of scale associated with cohabiting in households, with not
much difference found between the per capita case (no economies of scale) and the most
common equivalent scale found in the literature (of mostly middle- and high-income
countries).
The global trend, however, is similar although with different intensities, indicating
that the increase in inequality is robust to alternative methodological choices. The total
increase in inequality ranges between 16% and 20%, corresponding to 5%–9% during
9 Changes in Gini of real per capita consumption inequality over time are all statistically signif-
icant using bootstrap standard errors (bias-corrected 95%confidence intervals), except between
2002/03 and 2008/09 (see Table A1).
Figure 4. Lorenz curves of real per capita consumption [Colour figure can be viewed at
wileyonlinelibrary.com]
Source: Authors’ calculations based on IAF/IOF.
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Economic Society of South Africa.
the first period, and 11%–17% in the last period. Inequality declines in the intermedi-
ate period between 0% and 5%, depending on the case.10
Arndt and Mahrt (2017) have recently shown that re-scaling consumption by discrep-
ancies with National Accounts would increase the level of inequality as measured by the
Gini index. It would also affect the trend (with a higher increase between 2002/2003 and
2008/2009, and a lower increase in the last period). In the opposite direction, a correc-
tion for underreporting in food consumption in 2014/2015 (based on meals reported by
households that are not reflected in their consumption) would reduce the level of in-
equality in that year. Although one could expect this reduction to be larger than in pre-
vious years, the effect on the trend cannot be computed due to the lack of necessary
information.11 Due to these opposite effects and the impossibility of controlling for all of
them in all surveys, we do not make any adjustment for underreporting, but the results
should be interpreted in the context of these data limitations.
The Generalised Entropy (Fig. 6) family of measures also shows a unanimous increase
in inequality in real per capita consumption during the initial and, especially, final
10 The respective changes in the Gini index for each period are 8.6%, −2.1% and 10.6% for real
equivalised consumption, and 5.1%, −2.3% and 16.7% for nominal per capita consumption.
11 According to our own calculations, the Gini in 2014/15 would be smaller by between 0.004
and 0.020, depending on the assumptions made (for the methodology used in adjusting con-
sumption for under-reporting, see MEF/DEEF, 2016).
Figure 5. Gini index of consumption inequality, alternative consumption estimates [Colour
figure can be viewed at wileyonlinelibrary.com]
Note: Real consumption is nominal consumption adjusted using intra-survey temporary
and spatial price indices. The square root of the household size was used to estimate the
corresponding equivalised values.
Source: Authors’ calculations based on IAF/IOF.
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periods (with similar results for the Atkinson family of indices shown in the Appendix).
These indices also help better characterise the distributional pattern of the inequality
increase. They confirm that these increases in inequality tend to be larger with higher
sensitivity of the indices to top consumption values (higher α). In this line of reasoning,
the increase in inequality using the GE(2) is remarkable. In the last period, there was also
an important increase in inequality with higher sensitivity to the bottom of the distribu-
tion, likely the result of the underreporting of food consumption mentioned above. In
the intermediate 2002/2003–2008/2009 period, on the contrary, there is an increase or
a decline in inequality depending on whether we put more weight on inequality among
the poor or the better-off, respectively (inequality declines for α 1, increases otherwise),
which does not come as a surprise due to the crossing empirical Lorenz curves.12
4. METHODOLOGY: DECOMPOSING INEQUALITY CHANGES OVER TIME
Let y = (y1,…,yN) indicate a vector of consumption across a population of N individuals.
We will measure inequality using the Gini index, I(y). We assume that the contribution
of the ith individual to the overall inequality I(y) is given by the recentered influence
function of I, estimated for consumption yi, RIF (yi; I) (Firpo et al., 2007, 2009). The RIF
measures the impact on the target statistic of marginally increasing the population with
12 Changes in GE (and Atkinson) indices of real per capita consumption inequality over time
are all statistically significant at 95% using bootstrap standard errors (bias-corrected confidence
intervals), except between 2002/03 and 2008/09, in which case only GE(−2) and GE(−1) (and
A(2)) show statistically significant increases (see Table A1).
Figure 6. General Entropy (GE) indices of real per capita consumption inequality [Colour
figure can be viewed at wileyonlinelibrary.com]
Source: Authors’ calculations based on IAF/IOF.
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consumption yi, with the overall inequality being just the average impact, I(y) = E(RIF
(y; I)).13 The RIF function is a U-shaped transformation of yi, reflecting that a marginal
increase in the population with extremely low and high values would have a dispropor-
tional increase in inequality. A marginal increase in the population around the mean
consumption, however, will tend to have a small or no effect on inequality. The exact
values of the RIF function are index specific, in particular, reflecting the different sensi-
tivities of the indices to the different parts of the distribution. That is, some indices will
increase at a higher rate after a marginal increase in the population at the top or at the
bottom (see the analysis of the RIF of different inequality indices in Gradín, 2016, 2018).
The relationship between these individual contributions to inequality and household
characteristics is given by a N×K matrix X (including a constant) that can be estimated
by OLS14:
We can interpret βk, k 2, as the expected effect on inequality of a marginal change
in the average value of the kth characteristic,
̄xk
, ceteris paribus while β1 reflects the ex-
pected value of inequality when xk = 0, k 2. In the case of dummy variables, this means
that βk measures the marginal impact of a slight increase in the proportion of individuals
with xk = 1, and β1 the expected value of inequality for the reference household (defined
by the omitted categories).
We can thus rewrite I(y) as the sum of the impact of household characteristics on
inequality:
The counterfactual inequality index
I
01
(
y
)
=̄
X0
𝛽
1
indicates the expected value of in-
equality in the final year if the characteristics remained constant over time (superscripts
0 and 1 refer to the initial and final years, respectively). With this counterfactual, we can
decompose the change in inequality over time into two distinct contributions:
The coefficients effect, ̄
X0
(𝛽
1
𝛽
0
)
, is the structural change and it indicates the ex-
pected change in inequality if average characteristics had remained constant over time
13 Let us consider a mixture distribution
y𝜺
that assigns a probability
of having a mass
1
at
yi
and
1𝜀
of being the original distribution. The influence function
IF (
yi;I(y)
)
=
𝜕
𝜕𝜀
I(y𝜺)
|
𝜀=
0
is
the directional derivative of
I
for this mixture distribution when
𝜀0
and has zero expectation
(Hampel, 1974). By just adding the value of the target statistic, we obtain the
RIF (
y
i
;I(y)
)
=I
(
y
)
+IF
(
y
i
;I(y)
)
, where the expected value is the target statistic.
14 The
IF
for the Gini index was first documented in Monti (1991).
(1)
RIF
(yi;I)=
K
k=1
̄xk𝛽k+𝜀i
.
(2)
I
(y)=
N
i
=
1
RIF (yi;I)=̄
X𝛽=
K
k=1
̄xk𝛽k
.
(3)
I
1(
y
)
I
0(
y
)=̄
X1
𝛽1̄
X0
𝛽0=(̄
X1
̄
X0
)𝛽1+̄
X0
(𝛽1𝛽0
).
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and only the coefficients (i.e. their impact on inequality) changed. The characteristics
effect,
(
̄
X1
̄
X0
)
𝛽
1
, is the compositional effect and indicates the expected change in
inequality induced by changes in the average characteristics, evaluated with the coeffi-
cients estimated in final year,
𝛽1
.
Therefore, the evaluation of the individual contribution of each variable
xk
to the
characteristics and coefficients effects can be measured as
WΔX
k
=
(
̄x
1
k
̄x
0
k)
𝛽
1
k
and
WΔ𝛽
k
=̄x0
k(
𝛽1
k
𝛽0
k)
, so that the individual effects sum up the corresponding aggregate ef-
fects. Similarly, the sums of the characteristics and the coefficients effects of each charac-
teristic add up to the total contribution of that same characteristic,
WΔX𝛽
k
=WΔX
k
+W
Δ𝛽
k
.
Note that when the target statistic is the average of
y
, this procedure would lead to the
one proposed by Blinder (1973) and Oaxaca (1973).
The detailed coefficients effects, however, suffer from a well-known identification
problem (Oaxaca and Ransom, 1999). The contribution of each dummy variable depends
on which is the omitted category, and the contribution of a continuous variable depends
on the chosen scale. Although there are some proposals in the literature suggesting a nor-
malisation of the coefficients of dummies to assure that the detailed effects do not vary
with a change in the omitted category, we do not make any correction because all these
adjustments are ad hoc (Fortin et al., 2011). Thus, the results should be interpreted for
a given specification of the model. Neither the detailed characteristics effects nor the ag-
gregate coefficients and characteristics effects are affected by this identification problem.
Alternatively, a different counterfactual can be derived,
I
01
(
y
)
=̄
X
1
𝛽
0
, changing the
decomposition into characteristics and coefficients effects:
The difference between this decomposition and that in (3) is that now the coefficients
effect is valued with the final average characteristics
̄
X1
, while the characteristics effect
uses the initial coefficients
𝛽0
. Thus, we can interpret the characteristics effect as the
expected change in inequality if only characteristics had changed over time (but not the
coefficients), and the coefficients effect as the change in inequality after changing those
effects in the final year (while keeping the final average characteristics).
5. EXPLAINING THE INEQUALITY TRENDS
We now investigate the trends of inequality in Mozambique in two steps. We first iden-
tify the extent to which household characteristics are associated with inequality. Those
attributes, ceteris paribus, with higher impact on consumption at the extremes of the
distribution, especially at the very top, will tend to be more strongly associated with
higher inequality. Then, we estimate their contribution to the increase in inequality over
time, either through a compositional effect (changes in the proportions) or through a
structural effect (change in their relationship with inequality, i.e. the coefficients).
5.1 Household Characteristics and Inequality
The RIF regressions, reported in Table 1, show that inequality in 2014/15 tends to be
strongly increasing with the proportion of people living in Maputo City, and to a lower
(4)
I
1(
y
)
I
0(
y
)=̄
X
1
𝛽1̄
X
0
𝛽0=̄
X
1
(𝛽1𝛽0)+(̄
X
1
̄
X
0
)𝛽
0
13South African Journal of Economics Vol. 0:0 Month 2019
© 2019 UNU-WIDER. South African Journal of Economics published by John Wiley & Sons Ltd on behalf of
Economic Society of South Africa.
extent in other urban areas. This points to the fact that inequality in Mozambique is
closely related with higher inequality in urban areas (higher than in other African coun-
tries, see Fox et al., 2005) and to the large urban-rural gap, even after controlling for
Table 1. RIF regressions, 1996–2014
1996 /97 20 02/03 2002/03 2008/09 2 014/15
Estimate SE Estimate SE Estimate SE Estimate SE Estimate SE
Area
Urban 1996 0.055* 0.022 −0.020 0.032 – – – –
Urban 0.053* 0.026 0.031 0.021 0.053** 0. 017
Province
Niassa −0.048 0.029 0.003 0.028 0.014 0.029 0.168*** 0.049 −0.091* * 0.032
Cabo Delgado −0.014 0.034 0.085 0.063 0.093 0.067 0.055* 0.026 0.116*** 0.031
Nampula 0.009 0.033 0. 011 0.026 0.012 0.026 0 .118** 0.038 0.086* 0.034
Zambezia −0.063* 0.027 0.002 0.025 0.017 0.028 0.120*** 0.030 −0.090** 0. 031
Tet e −0 .012 0.027 0.036 0.024 0.047 0.026 0.058* 0.026 −0.129*** 0.031
Manica 0.026 0.037 0. 015 0.027 0.020 0.028 0.050* 0.024 −0.109*** 0.032
Sofala 0.060* 0.027 0.090* 0.037 0.092* 0.038 0.142*** 0.026 −0.034 0.034
Inhambane −0.008 0.027 0.112*** 0.024 0.127*** 0.026 0.111*** 0.025 −0.059 0.032
Gaza −0.026 0.031 0 .015 0.029 0.025 0.030 0.143*** 0.025 −0.032 0.031
Maputo City 0.005 0.042 0.108** 0.038 0.088* 0.037 0.184*** 0.038 0.413*** 0.066
Household size
N. adults 0.002 0.004 0.0 01 0.004 0.0 01 0.004 0.0 01 0.006 −0.027*** 0.005
N. children −0.004 0.004 −0.009* 0.004 −0.009* 0.004 −0.009* 0.004 −0.008** 0.003
Age (head)
25–34 −0.029 0.027 0.033 0.032 0.034 0.033 0.046 0.024 −0.02 0.017
35– 44 0.000 0.028 0.04 0.033 0.04 0.033 0.064* 0.025 0.035 0.018
45–54 −0.004 0.028 0.058 0.031 0.057 0.031 0.089*** 0.024 0.065** 0.024
55 or older 0.009 0.027 0.096* * 0.031 0.096** 0.031 0.081*** 0.023 0.071* * 0.024
Sex (head)
Female 0.012 0.025 0 .010 0. 019 0.006 0.019 0.016 0.020 0. 015 0.025
Marit al sta tus
(head)
Single 0.082* 0.037 0.14 4* 0.059 0.140* 0.059 0.215 0.118 0.097* 0.044
Divorced 0.002 0.026 0 .031 0.021 0.025 0.021 0.0 03 0.020 −0.021 0.028
Education
(head):
Atta ined
education
Some/lower
primary
0.014 0.016 0.021 0.018 0 .013 0.018 −0.018 0.010 −0.030*** 0.009
Upper primary 0.126*** 0.036 0.139* 0.064 0.12 2* 0.058 0.025 0.024 −0. 001 0.013
Lower secondary 0.454*** 0.100 0.342*** 0.079 0.333*** 0.078 0.168* 0.078 0.114*** 0.025
Upper secondar y 0.478* 0. 241 0.847*** 0.165 0.826*** 0.163 0.456*** 0.083 0.455*** 0.069
Tec h ni c al 0.506*** 0.137 0.641*** 0.148 0.628*** 0.147 0.412*** 0.111 0.558*** 0.095
Higher 2.071*** 0.492 3.061** 0.972 3.063** 0.969 1.738*** 0.325 1.690*** 0.150
Literate −0.013 0.012 0.021 0.012 0.019 0.012 0.002 0.010 0. 019* * 0.007
Employment:
Typ e (hea d)
Public sector −0.0 49 0.033 0.143* 0.070 0.136* 0.069 −0.154*** 0.047 −0.409*** 0.061
Self-employed 0 .017 0.025 0.007 0.043 0.016 0.043 0.005 0.035 0.017 0.014
Sector+ (head)
Subsistence −0.006 0 .031 0.057 0.051 0.058 0.0 51 −0.063 0.053 −0.066* 0.028
Non-subsistence 0.037 0.036 0.047 0.038 0.027 0.038 0.021 0.043 0.059* 0.028
Employment
rate
(household)
−0.027 0.028 0.118* * 0.042 0.141** 0.048 0.102 0.053 0.050 0.027
Intercept 0.404*** 0.042 0.230*** 0.052 0.188 ** 0.062 0.186*** 0.056 0.572*** 0.041
N Observations 42 ,143 44,083 44,083 51,175 16 4,359
R25.0 8.0 8.0 10.7 7. 6
F7.25*** 9.08*** 9.26*** 7.49*** 14.01***
Note: p-values: * < 0.05; ** < 0.01; *** < 0.001. +A category was included to indicate that the head’s
industry was missing.
Source: Authors’ calculations based on IAF/IOF.
14 South African Journal of Economics Vol. 0:0 Month 2019
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Economic Society of South Africa.
other characteristics like education or predominance of the subsistence sector. While
inequality in rural areas is 0.373, it is 0.552 in urban areas, with the highest level of 0.582
in Maputo City, in contrast with the lowest level of 0.312 in rural Tete. There is also a
large gap between the average real consumption of urban and rural areas: 1.3 times the
poverty line in rural areas versus 2.4 in urban areas, with the highest level in Maputo
(4.5) and the lowest in rural Niassa (1.0).
Inequality in 2014/15 tends to decline with the average number of household mem-
bers (especially, adults), and to increase with the proportion of people living in house-
holds in which the head is older or single and, especially, has attained upper secondary or
higher education. The education effect is again the result of higher between-group gaps,
with average real consumption 7.6 times the poverty line when the household head has
higher education, compared with only 1.2 when they have less than primary education.
It is also the result of higher education having more within-group inequality. The Gini
index is 0.566 among those with a head with higher education, and 0.379 when the head
has only achieved lower primary education.
Regarding the labour market status, inequality is reduced with the employment of
the household heads in the subsistence sector and, especially, in the public sector, and
increases with the employment rate of household members. There is a major difference
in the average consumption by sector (2.5 times the poverty line if the head works in the
non-subsistence sector; 1.2 in the subsistence sector), and in within-group inequality as
well (Gini is 0.512 versus 0.361, respectively). These results do however seem to vanish
after controlling for other characteristics like education or area of residence.
Some of the above effects have intensified over time, especially the dis-equalising ef-
fect associated with the proportion of people living in Maputo City, and the equalising
effect of the head working in the public sector. The dis-equalising effect of having some
college education in increasing inequality declined after 2002/03.
At the same time, there was a change in the composition of households by characteris-
tics over time (Table 2). There was a redistribution of population by provinces (with pop-
ulation increases in Tete and Manica, and declines in Sofala, Inhambane, Gaza or Maputo
City). This was accompanied by a decline in the average number of adults, an increase
in the average number of children and in the proportion of people living in households
with middle-aged, divorced or female heads. There was also a general increase in attained
education of household heads, along a reduction of self-employed and workers in the
public sector (from 11 to 6%) or in the subsistence sector (from 70 to 62%), all reflecting
a timid higher development and diversification of the modern sector of the economy after
the end of the war and the economic growth that followed (e.g. Jones and Tarp, 2016),
along the expansion of the educational system (e.g. van der Berg et al., 2017).
5.2 Decomposing Changes in Inequality
In the previous section, we established the trend towards higher inequality that was the
combined effect of changes in the characteristics and the marginal impact they had on
15South African Journal of Economics Vol. 0:0 Month 2019
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Economic Society of South Africa.
inequality. Table 3 reports the decomposition of the change in the overall inequality over
time into the characteristics and coefficients effects following the approach previously
described. It turns out that the increase in the Gini index between 1996/1997 and
Table 2. Distribution of characteristics, 1996/97–2014/15. Proportion of the population,
except for household size
Area 199 6/9 7 2002/03 20 08/09 2014/15
Urban (1996−2002) 0.210 0 .198 – –
Urban (2002−2014) 0.321 0.304 0.317
Province
Niassa 0.050 0.051 0.059 0.064
Cabo Delgado 0.077 0.084 0.078 0.0 74
Nampula 0.188 0.18 8 0.192 0.195
Zambezia 0.193 0.19 2 0.190 0.188
Tet e 0.068 0.077 0.090 0.098
Manica 0.057 0.067 0.070 0.075
Sofala 0.101 0.084 0.0 81 0.079
Inhambane 0.073 0. 074 0.061 0.058
Gaza 0.070 0.070 0.063 0.055
Maputo province 0.057 0.056 0.063 0.066
Maputo cit y 0.066 0.057 0.052 0.049
Household size
N. adults 3.150 3.122 2.844 2.994
N. children 3.050 3.094 3.112 3.224
Age (head)
Less than 24 0.068 0.061 0.064 0.060
25−34 0.234 0.255 0.265 0.224
35−44 0.264 0.269 0.264 0.289
45−54 0.216 0.198 0. 212 0. 211
55 or older 0.218 0 .217 0 .196 0.217
Sex (head)
Female 0.174 0.205 0.242 0.242
Marit al sta tus (head)
Married, union (or unknown) 0.850 0.820 0.818 0.808
Single 0.028 0 .015 0.015 0.032
Divorced, separated, widow(er) 0.122 0 .166 0.166 0.160
Education (hea d):
Attai ned education
None/unknown 0.690 0.697 0.255 0. 315
Some/lower primary 0.242 0.17 7 0.552 0.439
Upper primary 0.051 0.069 0.126 0.139
Lower secondary 0.009 0.031 0.031 0.041
Upper secondar y 0.002 0.015 0.016 0.033
Tec h ni c al 0.005 0.008 0.008 0.007
Higher 0. 001 0.003 0.012 0.025
Literate 0.522 0.5 44 0.553 0.568
Employment:
Typ e (hea d)
Public sector 0.112 0.077 0.063 0.058
Self-employed 0 .719 0.797 0.784 0.685
Sector (head)
Non-employed 0.073 0.043 0.038 0.010
Subsistence 0.700 0.688 0.714 0 .617
Non−subsistence 0. 219 0.268 0.248 0.283
Missing sector 0.008 0.001 0.001 0.000
Employment rate (hou sehold) 0.805 0.834 0. 881 0.782
Source: Authors’ calculations based on IAF/IOF.
16 South African Journal of Economics Vol. 0:0 Month 2019
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Economic Society of South Africa.
Table 3. Decomposition of the increase in Gini inequality, 1996/97–2014/15
Final Gini 19 96 /9 7−2 014/ 15 2002/03−20014/15 199 6 /9 7−2 002 /0 3 2002/03−08/09 200 8/0 9−14 /15
0.468*** (0.006) 0.468*** (0.006) 0.415*** (0.008) 0.415*** (0.007) 0.468*** (0.006)
Initial Gini 0.397*** (0.006) 0.415*** (0.008) 0.397*** (0.006) 0.415*** (0.008) 0.415*** (0.007)
Change in Gini 0.071*** (0.008) 0.052*** (0.010) 0.018 (0.010) 0.000 (0.010) 0.053*** (0.009)
Cha r. E Coef. E C har. E Coef. E Char. E Coef. E Cha r. E Coef. E Char. E Coef. E
Tot al Ef fect 0.070*** (0.010) 0.0 01 (0.010) 0.045*** (0.008) 0.007 (0.010) 0.037*** (0.008) −0.019* (0.008) 0.015* (0.007) −0.015 (0.011) 0.031*** (0.005) 0.021** (0.008)
Area 0.006** (0.002) 0.001 (0.006) 0.000 (0.000) 0.000 (0.010) 0.000 (0.000) −0.016 (0.008) −0.001 (0.000) −0.007 (0.011) 0.001 (0.000) 0.006 (0.008)
Province −0.012*** (0.002) −0.032 (0.038) 0.006** (0.002) −0.089* (0.037) 0.001 (0.001) 0.047 (0.032) −0.002 (0.001) 0.068* (0.032) −0.002 (0.001) −0.160*** (0.036)
Household size
N adults 0.004** (0.001) −0.092*** (0.020) 0.003** (0.001) −0.081*** (0.020) 0.000 (0.000) −0.008 (0.018) 0.000 (0.002) −0.001 (0.023) −0.004*** (0.001) −0.075** (0.022)
N children −0.001* (0.001) −0.010 (0. 014) 0.001 (0.001) 0.003 (0.016) 0.000 (0.001) −0.015 (0.017) 0.000 (0.001) −0.002 (0.019) −0.001 (0.000) 0.005 (0.016)
Age (head) 0.0 01 (0.001) 0.040 (0.029) 0.002* (0.001) 0.019 (0.032) 0.000 (0.001) 0.057 (0.036) 0.000 (0.001) 0.013 (0.034) 0.003** (0.001) 0.032 (0.026)
Sex (head) −0.001 (0.002) −0.005 (0.006) − 0.001 (0 .001) −0.004 (0.006) 0.000 (0.001) 0.000 (0.005) 0.001 (0.001) 0.002 (0.006) 0.000 (0.000) −0.008 (0.008)
Marital status (head)
Single 0.000 (0.000) 0.000 (0.002) 0.002* (0.001) 0.001 (0.001) −0.002* (0.001) 0.002 (0.002) 0.000 (0.000) 0.001 (0.002) 0.002* (0.001) −0.002 (0.002)
Divorced 0.0 01 (0.001) −0.003 (0.005) 0.000 (0.000) −0.008 (0.006) 0.0 01 (0.001) 0.004 (0.004) 0.000 (0.000) −0.004 (0.005) 0.000 (0.000) −0.004 (0.006)
Education+ (head) 0.052*** (0.007) −0.024** (0.007) 0.038*** (0.006) −0.054*** (0.011) 0.027*** (0.005) 0.022* (0.011) 0.011 (0.006) −0.040** (0.012) 0.034*** (0.004) −0.021 (0.011)
Employment:
Type (head)
Public s. (head) 0.022*** (0.004) −0.040*** (0.008) 0.008** (0.002) −0.021** (0.007) 0.005 (0.003) −0.010 (0.009) 0.002 (0.001) −0.001 (0.006) 0.002 (0.002) 0.016** (0.005)
Self-employed (head) −0.001 (0.000) 0.001 (0.021) 0.002 (0.002) 0.000 (0.036) 0.001 (0.003) −0.007 (0.036) 0.000 (0.000) −0.009 (0.044) −0.002 (0.001) 0.009 (0.029)
Sector (head)
Subsistence S. (head) 0.005* (0.002) −0.042 (0.029) 0.005* (0.002) −0.005 (0.040) 0.001 (0.001) −0.036 (0.042) −0.002 (0.001) 0.003 (0.051) 0.006* (0.003) −0.002 (0.042)
Non-subs. (head) −0.004 (0.002) −0 .021* (0.010) −0.001 (0.0 01) −0.023 (0.013) 0.002 (0.002) 0.002 (0.011) 0.000 (0.001) 0.001 (0.015) −0.002 (0.001) 0.020 (0.013)
Employment rate −0.001 (0.001) 0.062* (0.032) −0.003 (0.001) −0.075 (0.046) 0.003* (0.001) 0.117** (0.041) 0.005 (0.003) −0.032 (0.059) −0.005 (0.003) −0.046 (0.052)
Intercept 0.168** (0.059) 0.385*** (0.075) −0.174* * (0.0 67) −0.002 (0.084) 0.387*** (0.070)
Notes: p-values: * <0.05; ** <0.01; *** <0.001. Robust standard errors in parentheses below. + Education and literacy.
Source: Authors’ calculations based on IAF/IOF.
17South African Journal of Economics Vol. 0:0 Month 2019
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Economic Society of South Africa.
2014/2015 can be mostly explained by a compositional effect evaluated with the latest
survey’s estimated coefficients.15 Even if the initial high level of inequality in an under-
developed country like Mozambique does not fit very well in the Kuznets hypothesis, the
increase in inequality does, however, because it went along the emergence of a more di-
versified and skilled modern sector of the economy.
Indeed, the entire increase in inequality can be explained by the higher education of
household heads (0.053 or 75% of the total change) and the declining public sector
(0.022 or 31%).16 In the same line of reasoning, other factors that significantly contrib-
uted to increasing inequality were the declining employment in the subsistence sector
(7%) and the smaller average number of adults per household (6%) or the larger share of
single heads in the population (2%).17 These inequality-enhancing changes in character-
istics were compensated by other changes that helped mitigate the increase. They include
changes in the distribution of the population by province (with a contribution of −17%),
or the increase in the average number of children per household (−2%).
Apart from these compositional changes, there were also structural changes in the
relationship between these characteristics and inequality. The net coefficients or unex-
plained effect is negligible and statistically insignificant. However, this is the result of
some negative and significant effects compensated by a larger intercept. More specif-
ically, we find significant and substantial negative coefficients effects associated with
heads’ education, heads working in the public and non-subsistence sectors, and the num-
ber of adults. These effects are the result of these characteristics being associated with less
inequality in 2014/2015 compared with 1996/1997. This is consistent with the regres-
sions of (log-)consumption on the same set of characteristics showing returns to attained
education of the head in 2014/2015 lower than in 1996/1997 (but slightly higher than
in 2008/2009; see Table A8). That is, the impact on inequality of higher education or a
smaller public sector was mitigated by these facts becoming less dis-equalising over time.
The only positive and significant effect is associated with the household employment
rate, a dis-equalising factor in 2014/2015 that had an equalising effect in 1996/1997.
A closer look at the decomposition in Table 3 brings out the fact that education played
a fundamental role in explaining increasing inequality in all periods, reflecting a con-
solidated long-term trend. The effect of education on inequality was larger than the
15 The characteristics effect explains 99% of the increase in inequality, although 8 percentage
points are due to the change in the proportion of urban population, driven by a change in the
definition of the variable. The other 91 percentage points are reliable because the impact of the
change in the definition of area on the other coefficients is small in 2002/03 (Table 1).
Furthermore, the decomposition is consistent with the findings from comparing every pair of
consecutive surveys or the changes between 2002/03 and 2014/15, using comparable definitions
of area of residence (Table 3). In the latter case, the compositional effect accounts for 87% of the
increase in inequality.
16 Odusola et al. (2017) included the public sector among the skilled labour sectors that tend to
raise inequality in sub-Saharan countries (along mining, finance, insurance and the real estate).
In the Mozambican case, it seems that it was the reduction in this sector that contributed to in-
crease inequality, instead.
17 While the difference in the proportion of urban population contributes to 8%, we know that
the variables are not entirely comparable in both years, and the changes between comparable
years point to this factor not being especially relevant to explain the increasing inequality.
18 South African Journal of Economics Vol. 0:0 Month 2019
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Economic Society of South Africa.
increase in inequality observed in 1996/1997–2002/2003, and it explained 64% of the
rise between 2008/2009 and 2014/2015. Nevertheless, the absolute increase in the last
period (0.034) was larger than the contribution during the first period (0.027). In the last
period, other factors significantly contributed to increasing inequality, like the decline in
the subsistence sector (12%) and some demographic changes (higher proportion of single
heads, 3%, or age structure, 6%). The reduction in the number of adults contributed to
reducing inequality (by 8%). Regarding the coefficients effect, we see that the effect of
the household employment rate occurred in the first period. The negative coefficients
effect of education took place in the intermediate period, when education became less
associated with inequality (as opposed to the positive effect during the first period, and
the negative but statistically not significant effect in the last one). The coefficients ef-
fect associated with the average number of adults in the household and with the share
with heads employed in the public sector occurred in the last period, however, due to
an important increase in the equalising effects associated with both characteristics (that
followed the reduction in their average values).
The results are robust to some changes in the approach. Table A6 in the Appendix
shows that the results for the 1996/97–2014/15 period (using the RIF regressions re-
ported in Table A5) are very similar had we used nominal instead of real consumption.
The increase in inequality (0.089) can be explained by the combination of higher edu-
cation (0.061) and the decline in public (0.026) and subsistence sectors (0.05). However,
in this case, the total explained component is around 82% of the total change due to a
larger unexplained effect (captured by the intercept).
Finally, with the alternative counterfactual (Table A7) in which we evaluate the change
in characteristics using the initial values of the coefficients, the explained effect for the
increase in real consumption between 1996/97 and 2014/15 is even larger (higher than
100%18), with a much stronger contribution from education (due to the more dis-
equalising effect of this characteristic in 1996/97) and a weaker contribution from the
sectoral composition (because of its smaller equalising effect in the initial year). The co-
efficients effects valued using the final characteristics are very similar to the previous case,
when the initial ones were used (the educational coefficients effect is stronger, though).
6. CONCLUDING REMARKS
In this paper, we have investigated the trend in consumption inequality in Mozambique
since the end of the post-independence violent conflict. We have shown that the growth
pattern that led to a reduction in poverty over time went along with a substantial increase
in inequality, especially in most recent years. This was due to consumption dispropor-
tionally increasing among the better-off.
This increase in inequality, in line with the classical predictions for initial stages in the
development of dualistic economies, can be explained as the result of the emergence of
18 The difference with the previous counterfactual is that in this case the change in characteris-
tics is evaluated using the initial coefficients (generally associated with higher inequality for the
same characteristics). This implies that the aggregate coefficients effect (evaluated with the final
characteristics) is negative, indicating that if characteristics in 1996/97 were the same as in
2014/15, inequality would have been reduced over time.
19South African Journal of Economics Vol. 0:0 Month 2019
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Economic Society of South Africa.
an increasingly skilled population working in the small but expanding non-subsistence
private sector of the economy. The impact of the enhancement of this class was curbed
by its weaker association with inequality in consumption, mitigating the final increase
in inequality. However, initial inequality levels are too high to fully fit in the Kuznets’s
story, and the growth path predominant in the sub-Saharan region is quite different
from the one followed by other countries, due to its much weaker manufacturing indus-
try, its strong dependence on natural resources and its emerging service sector character-
ised by low productivity (e.g. Addison et al., 2017). In this context, rising inequality is the
most likely result in economies with growth taking place in sectors characterised by high
asset concentration, high capital absorption and skilled labour intensity, such as mining,
finance, insurance and real estate (Odusola et al., 2017). The opposite would be expected
if growth were based in labour-intensive sectors such as manufacturing, construction and
agriculture.
Growing inequality occurs in an already unequal country with a large divide between
urban and rural areas and among regions, with a limited redistributive capacity of the
state. This raises legitimate concerns about the implications of the current distributional
growth pattern if it accentuates the duality of the economy, especially when the country
is still facing major challenges in improving the living conditions for most of its popula-
tion, nearly half of which remains below the poverty line. For fulfilling the “no one left
behind” target encouraged by the sustainable development goals, Mozambique needs to
accelerate the expansion of education. This expansion should reach, especially, the least
developed rural communities to improve their productivity and living conditions above
the average, helping to narrow the large urban-rural gap.
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21South African Journal of Economics Vol. 0:0 Month 2019
© 2019 UNU-WIDER. South African Journal of Economics published by John Wiley & Sons Ltd on behalf of
Economic Society of South Africa.
APPENDIX
Table A1. Inequality indices and quantiles (real per capita consumption, divided by the poverty line)
Level Change (%)
1996 /97 20 02/03 20 08/09 2014/15 19 96/ 200 2 2002/2008 2008/2014 1996/ 2014
Mean 0.972 1. 315 1.329 1.613 35. 2 1.1 21.4 65.9
Quantiles
p5
0.254 0.333 0.316 0.337 31.2 −5.0 6.6 32.8
p10
0.329 0.427 0 .417 0.445 29. 8 −2.2 6.7 35.5
p25
0.485 0.630 0.637 0.683 29.9 1.1 7. 2 40.8
p50
0.726 0.958 0.977 1.0 69 31.9 2.0 9.5 4 7.4
p75
1.114 1.471 1.518 1.699 32.0 3.2 12.0 52 .5
p90
1.721 2.320 2.318 2.781 34.8 −0.1 20.0 61.6
p95
2.356 3.170 3.138 4.086 34.6 −1.0 30.2 73.4
Inequality
p50p10
2.2 2.2 2.3 2.4 1.7 4.2 2.7 8.8
p90p50
2.4 2.4 2 .4 2.6 2.2 −2.0 9.6 9.7
Gini
0.397 (0.002) 0.415 (0.004) 0.415 (0.003) 0.468 (0.002) 4.6 −0.1#12.7 17. 8
GE(2)
0.565 (0.012) 0.679 (0.025) 1.127 (0.06 4) 15.06 8 (4.775) 20.2 65.9 1 2 37. 9 2568.5
GE(1)
0.322 (0.004) 0.357 (0.007) 0.409 (0.008) 0.532(0.016) 10.8 14 .4 30.2 65. 2
GE(0)
0.268 (0.003) 0.297 (0.007) 0.303 (0.005) 0.381 (0.004) 10.7 2.2#25.7 42.3
GE(1)
0.313 (0.006) 0.380 (0.016) 0.367 (0.010) 0.520(0.013) 21.1 −3.4#41.8 66.0
GE(2)
0.601 (0.031) 1.132 (0.162) 0.887 (0.061) 2.242 (0.322) 88.5 −21.6 #152 .8 273.4
A(.1)
0.030 (0.001) 0.036 (0.001) 0.035 (0.001) 0.049 (0.001) 19.0 −2 .7#38.7 60.7
A(.25)
0.072 (0.001) 0.084 (0.003) 0.082 (0.002) 0.111 ( 0.00 2) 16.4 −1.7#34.7 54.0
A(.5)
0.133 (0.002) 0.151 (0.004) 0.150 (0.003) 0.194 (0.003) 13.1 −0.4#29.2 45.5
A(.75)
0.187 (0.002) 0.207 (0.005) 0.209 (0.003) 0.261 (0.003) 10.8 0.8#24.8 39.3
A(.9)
0.216 (0.002) 0.238 (0.005) 0.241 (0.004) 0.295 (0.003) 9.8 1.4 #22.5 36.5
A(1)
0.235 (0.003) 0.257 (0.005) 0.262 (0.004) 0.317 (0.003) 9.2 1.9#21.1 34.8
A(2)
0.392 (0.003) 0.417 (0.005) 0.450 (0.005) 0.516 (0.008) 6.3 7. 9 14.6 31.6
Note:
A(
𝜀
)
= Atkinson family;
GE (
𝛼
)
= Generalised Entropy family. Bootstrap standard error in parentheses (500 replications). (#) Statistically not
significant at 95%; the rest of the changes in Gini, Atkinson and GE indices are statistically significant (bias-corrected confidence intervals).
Source: Authors’ calculations based on IAF/IOF.
22 South African Journal of Economics Vol. 0:0 Month 2019
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Economic Society of South Africa.
Table A2. Inequality indices (real equivalised consumption using square root of the
household size)
Level Change (%)
1996 /97 20 02/03 2008/09 2014 /15 1996/2 002 2002/2008 2008/2014 199 6/2014
p50p10
2.1 2.1 2.3 2.3 2.2 8.7 0 pt 14.0
p90p50
2.1 2.4 2.3 2.5 12.1 −6.2 9.1 14. 8
Gini
0.373 0.405 0.397 0.439 8.6 −2.1 10.6 17.6
GE(2)
0.4 31 0.579 0.820 10. 221 34.5 41.6 1146 2274
GE(1)
0.271 0.327 0.357 0.481 20.7 9.3 34.7 7 7. 6
GE(0)
0.237 0.279 0.277 0.336 17. 6 0.9 21.6 41.7
GE(1)
0.285 0.346 0.332 0.431 21.1 −3.8 29.7 51.1
GE(2)
0.529 0.761 0. 751 1.419 43.9 −1.4 88.9 168.0
A(.1)
0.028 0.033 0.032 0.041 20.2 −3.8 28.1 48.2
A(.25)
0.065 0.078 0.075 0.095 19.1 −3.5 25.9 44.7
A(.5)
0.121 0.142 0.138 0.169 17.5 −2.9 2 2.9 40.3
A(.75)
0.169 0.196 0.192 0.232 16.3 −1.9 20.3 3 7.3
A(.9)
0.195 0.225 0.222 0. 265 15.6 −1. 2 19.0 35.9
A(1)
0.211 0.244 0.242 0.286 15.3 −0.8 18 .2 35. 2
A(2)
0.351 0.396 0. 417 0.491 12.5 5.4 17.7 39.6
Note:
A(
𝜀
)
= Atkinson family;
GE (
𝛼
)
= Generalised Entropy family.
Source: Authors’ calculations based on IAF/IOF.
Table A3. Inequality indices (nominal per capita consumption)
Level Change (%)
1996 /97 20 02/03 2008/09 2014 /15 19 96/200 2 2002/2008 2008/2014 1996/ 2014
p50p10
2.3 2.3 2 .5 2.6 −0.9 7.9 3.5 10.6
p90p50
2.7 2.7 2.6 3.2 −0.5 −1.9 20.9 18.0
Gini
0.448 0.471 0.460 0.537 5.1 −2.3 16 .7 19.8
GE(2)
0.781 0.921 1.601 21.23 17.9 73.9 1226 2618
GE(1)
0.419 0.460 0.513 0.734 9.7 11.5 43.2 75.1
GE(0)
0.341 0.380 0.371 0.505 11.4 −2 .4 35.9 47.8
GE(1)
0.416 0.520 0.465 0.701 25.2 −10.7 50.8 68.5
GE(2)
0.966 2.008 1. 315 3.166 10 7. 8 −34.5 141 228
A(.1)
0.040 0.049 0.044 0.0 65 22.5 −9.6 47.6 63.5
A(.25)
0.094 0.111 0.102 0.147 19.2 −8 .1 43.3 56.9
A(.5)
0.170 0 .195 0.184 0. 252 14.8 −5.9 37.2 48.3
A(.75)
0.234 0.262 0.252 0.332 11.7 −3.8 32 .1 41.8
A(.9)
0.268 0.296 0.288 0.372 10.2 −2.7 29.4 38.8
A(1)
0.289 0.316 0.310 0.396 9.4 −2.0 27. 7 37.0
A(2)
0.456 0.479 0.50 6 0.595 5.1 5.7 1 7.5 30.4
Note:
A(
𝜀
)
= Atkinson family;
GE (
𝛼
)
= Generalised Entropy family.
Source: Authors’ calculations based on IAF/IOF.
23South African Journal of Economics Vol. 0:0 Month 2019
© 2019 UNU-WIDER. South African Journal of Economics published by John Wiley & Sons Ltd on behalf of
Economic Society of South Africa.
Table A5. RIF Regressions, 1996/97–2014/15 (nominal per capita consumption)
1996 /97 2 014/15
Area
Urban 1996 0.081***
Urban 0. 015
Province
Niassa 0.100 * −0.277***
Cabo Delgado −0.095* −0.296***
Nampula 0. 051 −0.202***
Zambezia −0.130*** −0.205***
Tet e −0.07 −0.284***
Manica 0.044 −0.260***
Sofala 0.007 −0.172***
Inhambane −0.100* −0.232***
Gaza −0.090* 0.206***
Maputo City 0.132* 0.548***
Household size
N. adults −0.002 −0.030***
N. children 0.005 −0.006*
Age (head)
25−34 0.022 0.011
35−44 0.061** 0.062***
45−54 0.065** 0.090***
55 or older 0.067** 0.098***
Sex (head)
Female 0.031 −0.022
Marit al sta tus (head)
Single 0.087* 0.08
Divorced −0.023 −0.033
Education (hea d):
Attai ned education
Some/lower primary 0.022 −0.030***
Table A4. Inequality indices (nominal equivalised consumption using the square root of the
household size)
Level Change (%)
1996 /97 20 02/03 2008/09 2014 /15 1996/2 002 2002/2008 2008/2014 199 6/2014
p50p10
2.2 2.2 2.4 2 .5 0.1 11. 0 2.8 14.1
p90p50
2.7 2.8 2.6 3.1 2 .1 −8.2 21.5 13.8
Gini
0.442 0.468 0.445 0.511 5.8 −5.0 14 .9 15. 6
GE(2)
0.662 0.815 1.141 14.386 23.1 40.1 1161 2074
GE(1)
0.388 0.440 0.456 0.671 13.4 3.6 47. 3 73.1
GE(0)
0.330 0.371 0.345 0.456 12.6 −7.2 32.2 38.2
GE(1)
0.406 0.484 0.421 0.596 19. 2 −13.0 41.4 46.6
GE(2)
0.859 1.267 1.013 2.013 47. 5 −20.1 98.8 134
A(.1)
0.039 0.046 0.040 0.056 17.9 −12.4 39.4 43.9
A(.25)
0.091 0.106 0.094 0.128 16. 2 −11.5 36.5 40.4
A(.5)
0.166 0 .189 0.171 0.226 13.8 −9.8 32.3 35.9
A(.75)
0.228 0.255 0.235 0.303 11.9 7.9 28.7 32.6
A(.9)
0.261 0.289 0.270 0.342 11. 0 −6.8 26.7 31.1
A(1)
0.281 0.310 0.292 0.366 10.4 6.0 25.6 30.3
A(2)
0.437 0.468 0.477 0.573 7.1 1.9 20.2 31. 2
Note:
A(
𝜀
)
= Atkinson family;
GE (
𝛼
)
= Generalised Entropy family.
Source: Authors’ calculations based on IAF/IOF.
(Continued)
24 South African Journal of Economics Vol. 0:0 Month 2019
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Economic Society of South Africa.
Table A6. Decomposition of the increase in Gini inequality, 1996/97–2014/15 (nominal
per capita consumption)
1996 /97 2 014/15
Change in Gini 0.089*** (0.009)
Cha r. E Coef. E
Total Effect 0.073*** (0.011) 0.016 (0.011)
Area 0.002 (0.002) −0.014* (0.006)
Province 0.016*** (0.003) −0.102* (0.051)
Household size
N adults 0.005** (0.001) −0.087*** (0.021)
N children −0.001* (0.001) −0.003 (0.015)
Age (head) 0.001 (0.001) 0.005 (0.023)
Sex (head) −0.002 (0.002) −0.009 (0.007)
Marit al sta tus (head)
Single 0.000 (0.000) 0.000 (0.002)
Divorced 0.0 01 (0.001) −0.001 (0.005)
Education+ (head) 0.061*** (0.008) −0.044*** (0.007)
Employment:
Typ e (hea d)
Public s. (head) 0.026*** (0.004) −0.045*** (0.009)
Self-employed (head) −0.001 (0.001) −0.013 (0.022)
Sector (head)
Subsistence S. (head) 0.005* (0.002) − 0.053 (0.030)
Non-subs. (head) −0.006** (0.002) −0.030** (0.010)
Employment rate −0.002* (0.001) 0.096** (0.034)
Intercept 0.318*** (0.069)
Notes: p-values: * <0.05; ** <0.01; *** <0.001. Robust standard errors in parentheses below.
Source: Authors’ calculations based on IAF/IOF.
1996 /97 2 014/15
Upper primary 0.178*** 0.012
Lower secondary 0.648*** 0.152***
Upper secondar y 0.941* 0.502***
Tec h ni c al 0.914*** 0.647***
Higher 2.902*** 1.920***
Literate 0.000 −0.028***
Employment:
Typ e (hea d) −0.079* −0.485***
Public sector
Self-employed 0.044 0.026
Sector+ (head)
Subsistence 0.01− 0.066*
Non-subsistence 0.051 −0.087**
Employment rate (hou sehold) 0.0 51 0.068*
Intercept 0.428*** 0.746***
N Observations 42,143 164 ,359
R28.7 10.1
F9.65*** 13.08***
Note: p-values: * <0.05; ** <0.01; *** <0.001. +A category was included to indicate that the head’s
industry was missing.
Source: Authors’ calculations based on IAF/IOF.
Table A5. (Continued)
25South African Journal of Economics Vol. 0:0 Month 2019
© 2019 UNU-WIDER. South African Journal of Economics published by John Wiley & Sons Ltd on behalf of
Economic Society of South Africa.
Table A7. Decomposition of the increase in Gini inequality, 1996/97–2014/15 (alternative
counterfactual)
1996 /97 2 014/15
Change in Gini 0.071*** (0.008)
Cha r. E Coef. E
Total Effect 0.103*** (0.016) −0.033 (0.019)
Area 0.006* (0.002) 0.001 (0.009)
Province − 0.001 (0 .001) 0.043 (0.037)
Household size
N adults 0.000 (0.001) −0.087*** (0.019)
N children −0.001 (0.0 01) 0.011 (0.015)
Age (head) 0.000 (0.000) 0.040 (0.029)
Sex (head) 0.001 (0.002) 0.007 (0.008)
Marit al sta tus (head)
Single 0.000 (0.000) 0.000 (0.002)
Divorced 0.000 (0.001) 0.004 (0.006)
Education+ (head) 0.093*** (0.016) −0.064** (0.020)
Employment
Typ e (hea d)
Public s. (head) 0.003 (0.002) −0.021*** (0.004)
Self−employed (head) −0.001 (0.001) −0.001 (0.020)
Sector (head)
Subsistence S. (head) 0.000 (0.003) −0.037 (0.026)
Non−subs. (head) 0.002 (0.002) −0.027* (0.013)
Employment rate 0.0 01 (0.001) 0.060* (0.031)
Intercept 0.168** (0.059)
Notes: p-values: * <0.05; ** <0.01; *** <0.001. Robust standard errors in parentheses below.
Source: Authors’ calculations based on IAF/IOF.
Table A8. (Log-)Real per capita consumption regressions, 1996/97–2014/15
1996 /97 20 02/03 2002/03 2008/09 2014 /15
Area
Urban 1996 −0.055*** −0.088*** – – –
Urban −0.107*** −0.061*** −0.119***
Province
Niassa 0.125*** 0.346*** 0.356*** 0.392*** −0.557***
Cabo Delgado 0.118*** 0.125*** 0.138*** 0.317*** −0.296***
Nampula −0.091*** 0.216*** 0.240*** 0.135*** −0.519***
Zambezia 0.018 0.308*** 0.315*** 0.003 −0.536***
Tet e −0.261*** −0.006 0.000 0.231*** −0.217***
Manica 0 .174*** 0.289*** 0.300*** 0.055* * −0.285***
Sofala −0.537*** 0.512*** 0.520*** 0.004 0.242***
Inhambane −0.225*** −0.301*** −0.288*** 0.202*** −0.359***
Gaza 0.167*** 0.294*** 0.305*** 0.039* −0.372***
Maputo City 0.129*** 0.316*** 0.311*** 0.349*** 0.227***
Household size
N. adults −0.032*** 0.016*** 0.016*** −0.014*** 0.0 01
N. children −0.118*** −0.108*** −0.108*** −0.108*** −0.125***
Age (head)
25−34 −0.116*** −0.060** −0.058* 0.006 −0.002
35−44 −0.065*** −0.093*** −0.093*** 0.014 0.062***
45−54 −0.003 0.032 −0.03 0.026 0.068***
55 or older 0.067*** −0.048* −0.044 0.054** 0.076***
Sex (head)
Female 0.026 0.094*** 0.095*** 0.074*** 0.013*
Marit al sta tus (head)
Single 0.038 −0.03 0.0 21 0.101* * −0.008
Divorced −0.007 −0.117*** 0.110*** −0.128*** −0.040***
(Continued)
26 South African Journal of Economics Vol. 0:0 Month 2019
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Economic Society of South Africa.
1996 /97 20 02/03 2002/03 2008/09 2014 /15
Education (hea d):
Attai ned education
Some/lower primary 0.131*** 0.043*** 0.052*** 0.005 0.067***
Upper primary 0.347*** 0.310*** 0.322*** 0.120*** 0.169***
Lower secondary 0.542*** 0.635*** 0.650*** 0.344*** 0.385***
Upper secondar y 0.848*** 0.994*** 1.008*** 0.637*** 0.678***
Tec h ni c al 0.755*** 0.873*** 0.884*** 0.720*** 0.777***
Higher 1.390*** 1.324*** 1.327*** 1.106*** 1.229***
Literate 0.127*** 0.097*** 0.096*** 0.168*** 0.114***
Employment:
Typ e (hea d)
Public sector 0.014 0.032 −0.042* 0.079*** −0.039***
Self-employed 0.084*** 0.059*** 0.051*** 0.178*** 0.039***
Sector+ (head)
Subsistence −0.116*** −0.179*** −0.178*** −0.123*** −0.085***
Non-subsistence 0.139*** 0.054* 0.067** 0.120*** 0.168***
Employment rate
(household)
0.02 0.180*** 0.162*** −0.048* 0.237***
Intercept 0.151*** −0.082* 0.063 0.042 0.451***
N Observations 42 ,143 44,083 44,083 51,175 164 ,359
R230.0 27. 4 27. 6 24.0 34.8
F394*** 269*** 268*** 281*** 2,026***
Note: p-values: * <0.05; ** <0.01; *** <0.001. + A category was included to indicate that the head’s
industry was missing.
Source: Authors’ calculations based on IAF/IOF.
Table A8. (Continued)
27South African Journal of Economics Vol. 0:0 Month 2019
© 2019 UNU-WIDER. South African Journal of Economics published by John Wiley & Sons Ltd on behalf of
Economic Society of South Africa.
Table A9. Differentials in Lorenz curves between years
Percentile 1996/ 200 2 2002/08 2008/14 199 6/2 014 percentile 199 6/20 02 2002/08 20 08 /14 199 6/2014
10.000 0.000* 0.000 0.000*** 51 0.009 0.002 0.025*** 0.036***
20.000 0.001** 0.000 0.001*** 52 0.009 0.001 0.026*** 0.036***
30.000 0.001** 0.000 0.001*** 53 0.009 0.001 0.027*** 0.037***
40.000 0.001** 0.000 0.002*** 54 0.009 0.001 0.028*** 0.038***
50.000 0.002* 0.000 0.002*** 55 0 .010 0.001 0.028*** 0.039***
60.0 01 0.002* 0.001 0.003*** 56 0.010 0.0 01 0.029*** 0.040***
70.0 01 0.002* 0.001 0.003*** 57 0.010 0.0 01 0.030*** 0.041***
80.0 01 0.002* 0.001* 0.004*** 58 0.010 0.001 0.031*** 0.042***
90.0 01 0.002* 0.002* 0.005*** 59 0.010 0.001 0.032*** 0.043***
10 0.0 01 0.002* 0.002** 0.005*** 60 0.011 0.000 0.033*** 0.044***
11 0.0 01 0.002* 0.002** 0.006*** 61 0.011 0.000 0.033*** 0.045***
12 0.0 01 0.002* 0.003** 0.006*** 62 0.011 0.000 0.034*** 0.045***
13 0.002 0.002* 0.003** 0.007*** 63 0.011 0.000 0.035*** 0.046***
14 0.002 0.002 0.004** 0.008*** 64 0.011 0.000 0.036*** 0.047***
15 0.002 0.002 0.004** 0.009*** 65 0.012 0.001 0.037*** 0.048***
16 0.002 0.002 0.005*** 0.009*** 66 0.012 0 .001 0.038*** 0.049***
17 0.002 0.002 0.005*** 0.010*** 67 0.013 0.0 01 0.039*** 0.050***
18 0.002 0.003 0.006*** 0.011*** 68 0.013 0.001 0.039*** 0.051***
19 0.002 0.003 0.006*** 0.011*** 69 0.013 0.002 0.040*** 0.052***
20 0.003 0.003 0.006*** 0.012*** 70 0.013 0.002 0.041*** 0.053***
21 0.003 0.003 0.007*** 0.013*** 71 0.014 0.002 0.042*** 0.053***
22 0.003 0.003 0.007*** 0.013*** 72 0.014 0.002 0.043*** 0.054***
23 0.003 0.003 0.008*** 0.014*** 73 0.014 0.003 0.044*** 0.055***
24 0.004 0.003 0.009*** 0.015*** 74 0 .015 0.003 0.044*** 0.056***
25 0.004 0.003 0.009*** 0.016*** 75 0 .015 0.003 0.045*** 0.057***
26 0.004 0.003 0.010*** 0.016*** 76 0 .015 0.003 0.046*** 0.058***
27 0.004 0.003 0.010*** 0.017*** 77 0 .015 0.003 0.047*** 0.059***
28 0.004 0.003 0.011*** 0.018*** 78 0.016 0.004 0.048*** 0.060***
29 0.005 0.003 0.011*** 0.019*** 79 0. 017* 0.004 0.049*** 0.061***
30 0.005 0.003 0.012*** 0.019*** 80 0 .017 0.005 0.050*** 0.061***
31 0.005 0.003 0.012*** 0.020*** 81 0 .017 0.005 0.051*** 0.062***
32 0.005 0.003 0.013*** 0.021*** 82 0.017 0.005 0.051*** 0.063***
33 0.005 0.003 0.013*** 0.021*** 83 0.017 0.005 0.052*** 0.064***
34 0.005 0.003 0.014*** 0.022*** 84 0. 017 0.005 0.053*** 0.065***
35 0.005 0.003 0.015*** 0.023*** 85 0.017 0.005 0.053*** 0.065***
36 0.006 0.003 0.015*** 0.023*** 86 0. 017 0.006 0.054*** 0.066***
37 0.006 0.003 0.016*** 0.024*** 87 0.017 0.006 0.055*** 0.066***
38 0.006 0.003 0.016*** 0.025*** 88 0. 018 0.006 0.055*** 0.067***
39 0.006 0.002 0.017*** 0.026*** 89 0.018 0.006 0.056*** 0.068***
40 0.006 0.002 0.018*** 0.027*** 90 0.017 0.005 0.056*** 0.068***
41 0.007 0.002 0.018*** 0.027*** 91 0.018 0.006 0.056*** 0.069***
42 0.007 0.002 0.019*** 0.028*** 92 0.018 0.006 0.056*** 0.069***
43 0.007 0.002 0.020*** 0.029*** 93 0.018 0.006 0.056*** 0.068***
44 0.007 0.002 0.020*** 0.030*** 94 0.019 0.006 0.055*** 0.068***
45 0.008 0.002 0.021*** 0.031*** 95 0 .019 0.006 0.054*** 0.067***
46 0.008 0.002 0.022*** 0.031*** 96 0.019 0.005 0.052*** 0.066***
47 0.008 0.002 0.022*** 0.032*** 97 0.0 21* 0.005 0.049*** 0.065***
48 0.008 0.002 0.023*** 0.033*** 98 0.021* −0.003 0.044*** 0.063***
49 0.008 0.002 0.024*** 0.034*** 99 0.022** 0.0 01 0.035*** 0.055***
50 0.009 0.002 0.025*** 0.035***
Note: p-values: * <0.05; ** <0.01; *** <0.001 (bootstrap standard errors).
Source: Authors’ calculations based on IAF/IOF.
28 South African Journal of Economics Vol. 0:0 Month 2019
© 2019 UNU-WIDER. South African Journal of Economics published by John Wiley & Sons Ltd on behalf of
Economic Society of South Africa.
Table A10. Daily consumption shares (deciles, quintiles and top 5%) with standard errors
Per ca pita Equivalised (square root of household size)
1996 /97 20 02/03 2008/09 2014 /15 19 96/97 2002/03 2008/09 2014/15
Real* Sha re St.E. Share St.E. Share St.E. Share St.E. Share St.E. Share St.E . Share St.E. Share St.E.
D1 2.49 0.02 2.40 0.03 2.18 0.02 1.97 0 .01 2.80 0.02 2.57 0.03 2.31 0.02 2.13 0.01
D2 3.95 0.03 3.77 0.04 3.72 0.03 3.28 0.02 4.32 0.03 3.98 0.03 3.92 0.03 3.54 0.02
D3 4.97 0.03 4.77 0.04 4.75 0.03 4.23 0.02 5.31 0.03 4.92 0.04 5.01 0.03 4.54 0.02
D4 5.87 0.03 5.70 0.05 5.75 0.04 5 .15 0.02 6.26 0.03 5. 81 0.04 6.02 0.04 5.50 0.02
D5 6.92 0.04 6.71 0.06 6.78 0.04 6.10 0.03 7.22 0.04 6 .74 0.04 7. 02 0.04 6.50 0.02
D6 8.08 0.04 7.8 8 0.06 8.00 0.05 7.19 0.03 8.28 0.04 7.8 5 0.05 8.20 0.05 7.5 9 0.03
D7 9.48 0.05 9.19 0.07 9.43 0.05 8.59 0.04 9.58 0.04 9.19 0.06 9. 62 0.05 8.95 0.03
D8 11.50 0.05 11.19 0.08 11. 46 0.07 10.60 0.05 11.27 0.05 11.12 0.06 11.52 0.06 10.89 0.04
D9 14.82 0.07 14.68 0.11 14.82 0.08 14.15 0.06 14.15 0.06 14.43 0.08 14.63 0.07 14.32 0.05
D10 31.91 0.27 33.71 0.46 33.10 0.35 38.73 0.26 30.82 0.26 33.39 0.34 31.75 0.33 36.03 0.20
Q1 6.45 0.05 6 .17 0.06 5.90 0.05 5.25 0.03 7.1 2 0.05 6.55 0.05 6.23 0.05 5.66 0.03
Q2 10.84 0.06 10.47 0.09 10.51 0.07 9.38 0.04 11.57 0.06 10.73 0.07 11.03 0.07 10.05 0.04
Q3 15.00 0.08 14.58 0.12 14.7 8 0.09 13.30 0.06 15 .4 9 0.07 14.59 0.09 15. 22 0.08 14 .09 0.05
Q4 20.98 0.10 20.39 0.15 20.89 0.12 19.19 0.08 20.85 0.09 20.31 0.12 21.14 0 .11 19.85 0.07
Q5 46.73 0.24 48.39 0.38 47.92 0.29 52.88 0.21 44.97 0.24 4 7.82 0.30 46.38 0.28 50.35 0.17
Bottom
5%
0.98 0. 01 0.94 0.01 0.78 0.01 0.75 0.01 1.11 0.01 1.01 0.01 0.85 0.01 0.80 0.01
Top 5% 21.76 0.27 23.63 0.50 23.04 0.37 28.46 0.29 21.28 0.26 23.07 0.36 21.96 0.35 25.83 0.22
Val ue St.E. Valu e St.E. Va lu e St.E. Va lue St.E. Value St.E . Val ue St.E. Va lu e St.E. Va lu e St.E.
Mean 5,350 29 10,924 78 23.829 0.140 47.0 88 0.246 12,165 61 25, 211 148 53.617 0.290 106.180 0.4 41
Median 3,993 7,9 55 17.5 09 31.214 9,4 26 18,409 40.413 74 .491
Pover ty
line
5,502 8,307 17.90 0 29.200
Constant
Mean
0.972 1 .315 1.329 1.613
Nominal Share St.E. Share St.E. Share St.E. Share St.E. Share St.E. Share St.E . Share St.E. Sha re St.E.
D1 2.12 0.02 2.09 0.03 1.91 0.02 1.58 0.01 2.29 0.02 2.23 0.03 2 .01 0.02 1.71 0.01
D2 3.42 0.03 3.33 0.03 3.23 0.03 2.63 0.02 3.59 0.03 3.40 0.03 3.40 0.03 2.84 0 .01
D3 4.39 0.03 4. 21 0.04 4.19 0.03 3.46 0.02 4.54 0.03 4.18 0.03 4.39 0.03 3.70 0.02
D4 5.25 0.03 5.07 0.05 5.16 0.04 4.25 0.02 5.37 0.03 5.03 0.04 5.33 0.03 4.53 0.02
D5 6.19 0.04 5.99 0.05 6.20 0.04 5.14 0.03 6.24 0.04 5.93 0.04 6.37 0.04 5.46 0.02
D6 7.38 0.04 7.03 0.06 7.4 2 0.05 6. 21 0.03 7.29 0.04 6 .97 0.05 7.5 7 0.04 6.57 0.03
D7 8.97 0.05 8.35 0.07 8.99 0.05 7.6 6 0.04 8.68 0.05 8.27 0.05 9.11 0.05 7.9 8 0.03
D8 11.0 2 0.05 10.37 0.09 11.14 0.07 9.8 8 0.05 10.71 0.06 10.31 0.06 11.24 0.06 10.21 0.04
D9 14.86 0.08 14.17 0.11 14.73 0.08 14.16 0.07 14.73 0.07 14.48 0.09 14 .88 0.07 14.59 0.06
D10 36.38 0.28 39.38 0.46 37.0 4 0.34 45. 03 0.27 36 .56 0.27 39.19 0.34 35.70 0.31 42 .41 0.21
Q1 5.55 0.04 5.42 0.06 5 .14 0.04 4.22 0.03 5.88 0.04 5.63 0.05 5.41 0.04 4.55 0.02
29South African Journal of Economics Vol. 0:0 Month 2019
© 2019 UNU-WIDER. South African Journal of Economics published by John Wiley & Sons Ltd on behalf of
Economic Society of South Africa.
Q2 9.65 0.06 9.27 0.08 9.34 0.07 7.71 0.04 9.91 0.06 9.21 0.07 9.72 0.06 8.23 0.04
Q3 13.57 0.08 13.02 0.11 13.62 0.09 11.3 4 0.06 13.54 0.08 12.90 0.09 13.94 0.08 12.04 0.05
Q4 19.99 0.10 18.72 0.15 2 0.13 0.12 17.5 4 0.09 19.38 0.09 18.58 0.11 20.35 0.11 18.18 0.07
Q5 51.2 4 0.25 53.55 0.37 51.7 7 0.28 59.19 0 .21 51. 29 0.24 53.68 0.28 50.58 0.26 57.0 0 0.17
Bottom
5%
0.85 0.01 0.83 0.01 0.69 0.01 0.61 0.01 0.93 0.01 0.88 0.01 0.75 0 .01 0.65 0.01
Top 5% 25.55 0.28 28.88 0.51 26.52 0.37 33.98 0.31 25.69 0.26 28.41 0.35 25.27 0.33 31.0 9 0.24
Val ue St.E. Valu e St.E. Va lu e St.E. Va lue St.E. Value St.E . Val ue St.E. Va lu e St.E. Va lu e St.E.
Mean 5,355 36 10,903 104 23.882 0 .171 46.618 0.289 12,406 79 25,376 19 2 53.7 31 0.338 104.674 0.518
Median 3,594 7,09 0 16.181 26.267 8,323 16, 334 3 7.07 8 62.498
Note: Mean and median in MZM (1996/97 and 2002/03) and MZN (2008/09 and 2014/15). *Real values are obtained normalising nominal con-
sumption to account for variation in prices over the months of the survey and over 13 geographical areas. Def lated values are obtained by dividing
the current real consumption by the corresponding poverty line.
Source: Authors’ calculations based on IAF/IOF.
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Full-text available
Detailed analyses of poverty and wellbeing in developing countries, based on household surveys, have been ongoing for more than three decades. The large majority of developing countries now regularly conduct a variety of household surveys, and their information base with respect to poverty and wellbeing has improved dramatically. Nevertheless, appropriate measurement of poverty remains complex and controversial. This is particularly true in developing countries where (i) the stakes with respect to poverty reduction are high; (ii) the determinants of living standards are often volatile; and (iii) related information bases, while much improved, are often characterized by significant non-sample error. It also remains, to a surprisingly high degree, an activity undertaken by technical assistance personnel and consultants based in developed countries. This book seeks to enhance the transparency, replicability, and comparability of existing practice. It also aims to significantly lower the barriers to entry to the conduct of rigorous poverty measurement and increase the participation of analysts from developing countries in their own poverty assessments. The book focuses on two domains: the measurement of absolute consumption poverty and a first-order dominance approach to multidimensional welfare analysis. In each domain, it provides a series of computer codes designed to facilitate analysis by allowing the analyst to start from a flexible and known base. The volume covers the theoretical grounding for the code streams provided, a chapter on ‘estimation in practice’, a series of eleven case studies where the code streams are operationalized, a synthesis, an extension to inequality, and a look forward.
Chapter
Full-text available
Detailed analyses of poverty and wellbeing in developing countries, based on household surveys, have been ongoing for more than three decades. The large majority of developing countries now regularly conduct a variety of household surveys, and their information base with respect to poverty and wellbeing has improved dramatically. Nevertheless, appropriate measurement of poverty remains complex and controversial. This is particularly true in developing countries where (i) the stakes with respect to poverty reduction are high; (ii) the determinants of living standards are often volatile; and (iii) related information bases, while much improved, are often characterized by significant non-sample error. It also remains, to a surprisingly high degree, an activity undertaken by technical assistance personnel and consultants based in developed countries. This book seeks to enhance the transparency, replicability, and comparability of existing practice. It also aims to significantly lower the barriers to entry to the conduct of rigorous poverty measurement and increase the participation of analysts from developing countries in their own poverty assessments. The book focuses on two domains: the measurement of absolute consumption poverty and a first-order dominance approach to multidimensional welfare analysis. In each domain, it provides a series of computer codes designed to facilitate analysis by allowing the analyst to start from a flexible and known base. The volume covers the theoretical grounding for the code streams provided, a chapter on ‘estimation in practice’, a series of eleven case studies where the code streams are operationalized, a synthesis, an extension to inequality, and a look forward.