Roula Inglesi-Lotz

Roula Inglesi-Lotz
University of Pretoria | UP · Department of Economics

Ph.D.Economics

About

82
Publications
19,577
Reads
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3,187
Citations
Additional affiliations
January 2015 - present
University of Pretoria
Position
  • Professor (Associate)
September 2011 - December 2014
University of Pretoria
Position
  • Professor (Associate)
Education
January 2009 - September 2011
University of Pretoria
Field of study
  • Economics
January 2007 - September 2008
University of Pretoria
Field of study
  • Economics
September 2001 - September 2006
University of Macedonia
Field of study
  • Economics

Publications

Publications (82)
Article
Full-text available
The misallocation and scarcity of food, energy and water resources have been a challenge for African countries, mainly as they try to achieve long-term future sustainable development. This study explores the dynamic relationship between water, energy, food and economic conditions in Angola, Ethiopia, Kenya, Nigeria and South Africa. Since the water...
Article
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Empirical studies on the environmental Kuznets curve (EKC) hypothesis have not reached a consensus on their findings because different environmental indicators are used, among other reasons. So, this study proposes using a composite index encompassing all dimensions of environmental pollution, using the composite environmental quality index (CEQI)...
Article
Electricity availability and generation have a significant impact on the economies internationally. Understanding the factors affecting the electricity supply sector is imperative towards improving the industry and achieving a sustainable energy future for all as per the United Nations Sustainable Development Goals (SDGs) to 2030. This study mainly...
Article
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South Africa has been experiencing a series of power cuts since 2008 due to the state‐owned electricity distributor's (Eskom) insufficient power generation capacity. The ongoing energy crisis has negatively impacted the growth and development of the South African economy. Therefore, it is imperative to have an insight into what explains electricity...
Article
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Environmental concerns have become one of the top inevitable issues the world has been facing nowadays. Human-induced carbon emissions are the main reasons behind these environmental issues and to reduce them and mitigate their consequences, policymakers globally explore their drivers and determinants continuously. Although several socio-economic f...
Article
This study examines the complex relationship between carbon emissions and technological progress in a sample of 60 countries divided into four income groups for the period 1989–2018. For robustness purposes and due to the broad definition of technology, we use six different proxies to represent technology: Information and telecommunication technolo...
Article
Even though energy poverty has been widely discussed in many countries, only a few studies attempt to understand the nexus of race and energy poverty. To fill the gap in the literature, this study analyses the effect of race on energy poverty by employing the U.S. representative household panel data with 9043 complete surveys. This research address...
Article
Mozambique is one of the largest energy producers in the Southern African Development Community. Substantial efforts have been undertaken in recent years to increase energy access for poverty reduction in the country, however, most efforts seem to be concentrated to rural areas ignoring the existence of urban energy poverty, and despite all the eff...
Article
The centrality of electricity to everyday life is indisputable, and the price thereof can have significant implications. Literature is inconclusive over the effect of the renewable energy share in the energy mix on retail electricity prices as a country-specific regulatory policy has a significant impact on retail electricity prices. The purpose of...
Article
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The pollution haven hypo thesis (PHH) postulates that foreign direct investment (FDI) inflows can increase environmental deterioration in developing countries as multinational firms tend to transfer their dirty industries to these countries. Turkey, as a developing economy, has witnessed intense FDI inflows over the last decades. Within this scope,...
Article
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Inward Foreign Direct Investment (FDI) plays an important role on the overall economic conditions of host countries, particularly the ones that are still in low developmental stages. South Africa (SA) as an example of this group of countries has also experienced intermittent electricity supply and increasing electricity tariffs since 2008. As the l...
Article
Comprehending the determinants of renewable energy (RE) deployment has preoccupied the energy literature as well as policymakers internationally due to countries' overall shift away from fossil fuels in the energy mix. As stated in the literature, empirical studies that analyze the determinants of RE deployment use a number of different indicators...
Article
The purpose of this study is to examine the validity of the EKC hypothesis for Tunisia for the period from 1965 to 2013 by using the CO2 emissions and the Ecological footprint as proxies for environmental degradation, with the latter being considered in the literature as a more inclusive indicator. The findings of the estimation stipulate a U – sha...
Article
This paper investigates the relationship between biomass energy consumption and economic growth for 26 OECD countries for 1980 to 2013 period. This study used panel unit root analyses, panel cointegration analyses, dynamic OLS analyses, fully modified OLS analyses and panel VECM Granger causality to examine the relationship. The results reveal the...
Article
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The purpose of this study is to examine the role of economic structure of European countries into testing the Environmental Kuznets Curve (EKC) hypothesis for European countries for the period 1980 to 2014. This study is inspired by the work of Lin et al. (J Clean Prod 133:712–724, 2016), which made the first effort to investigate the phenomenon lo...
Article
The energy industry has a significant influence over the sustainability of the economies from job creation to resource efficiency and the environment. This study's purpose is to examine the causal dynamics between energy (renewable and non-renewable) on GDP taking into account the role R&D expenditure, representing technological progress, plays in...
Article
This study analyzes whether there is a threshold effect in the innovation-growth relationship. Using data from the period 2008–2017, we perform an analysis using 60 countries in the whole sample and a split-sample analysis in which we separate developed countries (36) from developing countries (24). The results for the panel smooth transition regre...
Article
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Background: The circular economy framework for human production and consumption is an alternative to the traditional, linear concept of 'take, make, and dispose'. Circular economy (CE) principles comprise of 'design out waste and pollution', 'retain products and materials in use', and 'regenerate natural systems'. This commentary considers the ris...
Article
This article aims to explore the dynamic relationship between innovation and climate changes for a sample of 60 countries. We performed an aggregated analysis in which we use the whole sample (60 countries) and a disaggregated analysis in which we split the sample in developed (36 countries) and developing (24 countries). We estimate a balance pane...
Article
This article aims to explore the dynamic relationship between innovation and climate changes for a sample of 60 countries. We performed an aggregated analysis in which we use the whole sample (60 countries) and a disaggregated analysis in which we split the sample in developed (36 countries) and developing (24 countries). We estimate a balance pane...
Article
Full-text available
G7 countries and China are considered not only the biggest energy producers globally but also the largest CO2 emission groups of countries among the world. In this study, we apply the Fourier quantile unit root test to investigate whether CO2 emissions converge in China and G7 countries using per capita CO2 emissions data over 1950–2013. While trad...
Article
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Optimisation and diversification of South Africa’s energy generation mix is fundamental to meeting its developmental goals and enhancing the crucially important security of supply. South Africa should investigate means to diversify its generating capacity. With the growing demand, South Africa has reached a point where other methods of power genera...
Article
Given the significance of the residential sector in terms of energy consumption, a comprehensive understanding of households’ energy consumption patterns and choices is imperative. This paper focuses on analysing and understanding the South African residential sector's energy characteristics considering their energy-use profile, and other character...
Article
Figuring out the convergence and persistence of per capita CO2 emissions matters much for environmental policy makers in both developed and developing countries. The Kyoto Protocol aims at avoiding threat from climate warming for human beings. CO2 emissions have been viewed as the main cause of climate change in recent decades. Thus, loads of empir...
Article
The paper aims to define the optimal thresholds of publications and Research and development expenditure (R&D) and to investigate their impacts on patenting in OECD and BRICS countries. To do so, we use a dataset of 25 countries divided into two country sub-samples for the period 1996-2013, employing the Panel Smooth Transition Regression model (PS...
Article
This study revisits whether CO2 emissions converge in G18 countries over the period of 1950–2013. To work on this empirical analysis, we employ a more powerful quantile unit root test with per capita CO2 emissions. While conventional unit root tests fail to reject convergence in CO2 emissions in these G18 countries, quantile unit root test results...
Article
Undoubtedly, the increasing rates of CO2 emissions contribute highly to climate change. Studies stress the importance of understanding the determinants of emissions, in order to implement appropriate policies. In the past, literature only looked at the effect of aggregate energy to emissions; while nowadays, with the increasing role of renewables,...
Article
This paper employs an LMDI decomposition exercise to investigate the main factors that affect changes in CO2 emissions of South Africa at national level within the BRICS group of countries (Brazil, Russia, India, China, and South Africa) from 1990 to 2014. From the results, it is expected to derive some information on the existence of the energy re...
Article
Full-text available
We report the results of an effort to measure the contribution of copyright-based industries to the South African economy. Following the methodology of the World Intellectual Property Organization, we identify the copyright industry’s contribution to GDP, employment, imports and exports in South Africa for the period 1970–2009. It was estimated tha...
Article
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This study revisits coal consumption, CO2 emissions and economic growth nexus for both China and India using a newly developed Bootstrap ARDL model over the period of 1969–2015. Empirical results indicate no long-run relationship among these three variables for both China and India, and Granger causality test based on Bootstrap ARDL model indicates...
Article
In order to remedy the continuous problem of sustainable energy supply, the South African government committed itself to pursuing renewable energies (RE) as a viable alternative to traditional sources such as fossil fuels. The aim of this study is to understand whether the policies pursued by the South African government in the period 1990–2010 hav...
Article
Dependency on coal consumption to maintain energy security is common to the majority of developing countries where the coal is found in abundance. China and India are the leaders in coal consumption from the developing countries group, so establishing a relationship between the coal consumption and the economic growth for these two will derive usef...
Article
The electricity demand in South Africa has experienced vast changes both from a policy point of view and due to the country's great industrialisation and urbanisation. The literature dealing with the South African electricity case, to date, has not taken into account these changes and their effect to the symmetric behaviour of the residential and i...
Article
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This paper reexamines the relationship between energy consumption and output growth in China over the period from 1969 to 2013, using an asymmetric Granger causality test proposed by Hatemi-J (2012). This article uses oil and coal as the major energy consumption variables because both coal consumption increased by more 2.3 billion over the past 10...
Article
Even though the energy-growth-environment literature put a lot of effort into investigating the impact on carbon dioxide (CO2) emissions of aggregate energy consumption, aggregate renewable energy consumption and aggregate non-renewable energy consumption, the importance of biomass energy consumption for the environment is not well covered. Besides...
Article
This paper empirically analyzes the causal linkages between coal consumption and economic growth in the BRICS countries (Brazil, Russia, India, China, and South Africa) using annual data from 1985 to 2009. Due to the common directions and principals of the BRICS countries with regard to energy, the employed panel causality methodology is chosen to...
Article
The importance of investment in Research and Development (R&D) in the energy sector is indisputable especially considering the benefits of new technologies to sustainability, security and environmental protection. However, the nature and potential of various energy technologies that are capable of improving the energy and environmental conditions g...
Article
This paper investigates the role that the building of two new power stations, Medupi and Kusile, will play in facilitating future economic activity in South Africa. We use a dynamic computable general equilibrium (CGE) model to estimate the economy-wide effects of these new power stations. Our simulation results also provide insight into how much t...
Article
This paper investigates the existence and dating of electricity price bubbles in South Africa from 1965 to 2013. In the literature, it is agreed that such a task is difficult due to the explosive nature of price bubbles and labeling their presence’s occurrence. To overcome the predicament, the authors followed the methodological approach suggested...
Article
This article examines the relationship between energy consumption (EC) and economic growth for South Africa for the period 1971–2009. Most studies examining this relationship do assume that it remains constant through the years; however, the reality might be different since many factors can affect the existence and direction of this causality. This...
Article
The purpose of this paper is to review, summarize, and critically assess the academic studies that have dealt with either the causal relationship between energy consumption and growth or the determinants of energy demand in South Africa from 2007 and outline recent forecasts for electricity demand. The results of this review aim to identify gaps in...
Article
Abu Dhabi, marketed as a centre of economic development in its geographic area during the post-oil era, is renowned for being a choice destination of high value individuals and tourists, due to its rich coastal and marine resources as well as the high quality of services. Outbreaks of harmful algae blooms (HAB) (red tides) due to increased eutrophi...
Article
Renewable energy has been a "hot topic" since the increased awareness of the consequences of climate change. Africa is vulnerable to such climate changes and, hence, should be more aware of the impact of fossil fuel generation on the environment although it has coal in abundance. South Africa is among the countries who negatively contributed to the...
Article
In this paper we examine the causal relationship between renewable energy consumption and economic growth across the G7 countries, using annual data for the period of 1990-2011. By employing the causality methodology proposed by Emirmahmutoglu and Kose (2011) [8], we investigate if there is a causal relationship between the variables. The advantage...
Article
Recent studies have shown increasing interest on the relationship between research output and economic growth. The study of such a relationship is not only of theoretical interest, but it can also influence specific policies to improve the quality, and probably the quantity of research output. This article has studied this relationship in G7 countr...
Article
In this paper, we estimate the price elasticity of electricity for various industrial sectors of the South African economy from 2002 to 2011. The data used include sectoral electricity consumption data and electricity tariff data, both courtesy of Eskom as well as output data based on national statistics. The most important contribution this paper...
Article
The convergence of air pollutants is a major concern for policymakers since all the countries pursue the goal of allocating the emissions equally internationally in the future. Hence, the examination of the existence of convergence is important for the climate change protection of the earth. In this article, greenhouse gas (GHG) emissions convergen...
Article
This article re-examines the nature of the causality between natural gas consumption and economic growth in G7 countries over the period from 1965 to 2011. We employ the Granger causality procedure proposed by Emirmahmutoglu and Kose (2011) which takes into account cross-sectional dependency and heterogeneity across countries. Our overall empirical...
Article
The causal relation between research and economic growth is of particular importance for political support of science and technology as well as for academic purposes. This article revisits the causal relationship between research articles published and economic growth in Organisation for Economic Co-operation and Development (OECD) countries for th...
Article
Internationally, the importance of renewable energy in the energy mix has been increasingly appreciated. The advantages of the renewable energy usage for the world’s energy security and the environment are indisputable and much discussed in the literature. However, its effects on the economic welfare of the countries are yet to be examined fully an...
Article
The study revisits the causality relationship between electricity consumption per capita and economic growth per capita in South Africa for the period 1971-2009 using annual data and takes into consideration different time/sample periods in causal relationships using bootstrapping techniques in conjunction with rolling Granger non-causality tests....
Article
The causal link between tourism receipts and GDP has recently become a major focus in the tourism economics literature. Results obtained in recent studies about the causal link appear to be sensitive with respect to the countries analysed, sample period and methodology employed. Considering the sensitivity of the causal link, we use rolling window...
Article
Full-text available
This main purpose of this paper is to investigate the causal relationship between knowledge (research output) and economic growth in US over 1981–2011. To overcome the issues of ignoring possible instability and hence, falsely assuming a constant relationship through the years, we use bootstrapped Granger non-causality tests with fixed-size rolling...
Article
Full-text available
We present the direct and indirect contributions of higher education institutions in South Africa to certain macroeconomic indicators such as GDP and employment, with the ultimate purpose of establishing their importance for the country. Taking this a step further, funding of these institutions is crucial in order for them to continuously produce o...
Article
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This study examines the importance of technological progress to aggregate economic growth in South Africa. Quantifying the contribution of technological progress to economic growth has become imperative, considering the outcome of a simple growth accounting exercise. The findings of this exercise indicate that the contribution of technological grow...
Article
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An increasing number of researchers have recently shown interest in the relationship between economic growth of a country and its research output, measured in scientometric indicators. The answer is not only of theoretical interest but it can also influence the specific policies aimed at the improvement of a country’s research performance. Our pape...
Article
This study reexamines the causal link between electricity consumption, economic growth and CO2 emissions in the BRICS countries (i.e., Brazil, Russia, India, China, and South Africa) for the period 1990–2010, using panel causality analysis, accounting for dependency and heterogeneity across countries. Regarding the electricity–GDP nexus, the empiri...
Article
Full-text available
In South Africa, water is considered a limited source, not only because of the country’s arid nature, but also because of the relatively skew distribution of the resource and the fact that 98% of the resource is already allocated. Eskom, the South African electricity supplier, commenced with the construction of two new coal-fired power stations nam...
Article
Improving a country’s electricity efficiency is considered one of the important ways to reduce its greenhouse gas emissions and to meet its commitments concerning climate change mitigation. In this paper, we conduct a comparative analysis between South Africa and OECD members’ total and sectoral electricity intensities. This is done to establis...
Article
Improvement of energy efficiency has been accepted as one of the most cost-effective approaches towards sustainable economic development and reduction of the continuously increasing energy consumption internationally. South Africa, being among the developing countries, is not an exception even though historically low energy prices and the lack of a...
Article
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In this paper, we examine the effects of money supply, portfolio, aggregate spending, and aggregate supply shocks on real US stock prices in a structural vector autoregression framework using quarterly data for the period of 1947:1-2011:3. Overall, the empirical results indicate that each macro shock has important effects on real stock prices, with...
Article
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Numerous studies have assumed that the price elasticity of electricity demand remains constant through the years that is industrial consumers behave the same way to price fluctuations regardless the actual price level. This paper proposes that the price elasticity of industrial electricity demand is time varying. To do so, the Kalman filter methodo...
Article
South Africa’s electricity consumption has shown a sharp increase since the early 1990s. Here we conduct a sectoral decomposition analysis of the electricity consumption for the period 1993–2006 to determine the main drivers responsible for this increase. The results show that the increase was mainly due to output or production related factors, wit...
Article
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The influence of the National Research Foundation’s (NRF) rating system on the productivity of the South African social science researchers is investigated scientometrically for the period from 1981 to 2006. Their output performance is mainly indicated by their research publications. Following international best practice in scientometrics as well...
Article
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This paper investigates the long-run impact of inflation on homeowner equity in South Africa by analysing the relationship between house prices and the prices of non-housing goods and services. Quarterly data series are collected for the luxury, large middle-segment, medium middle-segment, small middle-segment and the entire middle segment of house...
Article
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This paper analyses electricity consumption patterns in South Africa in an attempt to understand and identify the roots of the current electricity crisis. This is done by investigating various economic sectors’ responses to price changes using panel data for the period 1993–2004. Positive and statistically significant price elasticities over this p...
Article
In 2008, South Africa experienced a severe electricity crisis. Domestic and industrial electricity users had to suffer from black outs all over the country. It is argued that partially the reason was the lack of research on energy, locally. However, Eskom argues that the lack of capacity can only be solved by building new power plants. The objectiv...
Article
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This paper examines the South African economic sector's electricity consumption in response to fluctuations in electricity prices and economic output for the period 1993 to 2006. The results of the panel data analysis show that the industrial sector was the only one with statistically significant price elasticity over the study period. Further, eco...
Article
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Globally, the classification and ratings of universities are based mainly on an institution's research productivity. South Africa, especially in the last decade, has experienced an increasing skills shortage, making the need for new and appropriately qualified graduates a priority for the nation. A review in 1991 by Pouris examined the trends in th...
Article
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This article examines the importance and contribution of technological progress to aggregate economic growth in South Africa. Being able to explain technological progress is imperative, considering the outcome of a simple growth accounting exercise, indicating that the contribution of technological growth to aggregate economic growth increased subs...
Article
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Within a short period, Eskom has applied to the National Energy Regulator of South Africa (NERSA) for the third time since the 2008 electricity crisis, proposing a multiyear price determination for the periods 2010-2011 and 2012-2013. The new application, submitted at the end of September 2009, motivated for the debate of strategies with which the...

Questions

Question (1)
Question
For example, if someone wants to define the determinants of a variable such as electricity consumption what would be the best available econometric method to do so?
In the past, I have used the Engle-Granger cointegration methodology as well as the ARDL methodology for time series and simple panel data techniques. 

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