Kevin Lang

Boston University | BU · Department of Economics

To determine whether scaling decisions might account for fadeout of impacts in early education interventions, we reanalyze data from a well-known early mathematics RCT intervention that showed substantial fadeout in the two years after the intervention ended. We examine how various order-preserving transformations of the scale affect the relative m...

We review the empirical literature in economics on discrimination in the labor market and criminal justice system, focusing primarily on discrimination by race. We then discuss theoretical models of taste-based discrimination, particularly models of frictional labor markets and models of statistical discrimination, including recent work on invalid...

We use the exchange between Kearney/Levine and Jaeger/Joyce/Kaestner on 16 and Pregnant to reexamine the use of DiD as a response to the failure of nature to properly design an experiment for us. We argue that (1) any DiD paper should address why the original levels of the experimental and control groups differed, and why this would not impact tren...

We address the ordinality of test scores by rescaling them by the average eventual educational attainment of students with a given test score in a given grade. We show that measurement error in test scores causes this approach to underestimate the black-white test score gap and use an instrumental variables procedure to adjust the gap. While the un...

Much nonmanagerial work is routine, with all workers having similar output most of the time. However, failure to address occasional challenges can be very costly, and consequently easily detected, while challenges handled well pass unnoticed. We analyze job assignment and worker monitoring for such “guardian” jobs. If monitoring costs are positive...

Studies of the effects of school entry age on short-run and long-run outcomes generally fail to capture the parameter of policy interest and/or are inconsistent because the instrument they use violates monotonicity, required for identification of a local average treatment effect. Our instrument addresses both problems and shows no effect of entry a...

Using five cycles of the National Survey of Family Growth, we estimate the effect of teen motherhood on education, labor market, and marriage outcomes for teens conceiving from 1940 through 1968. Effects vary by marital status at conception, socioeconomic background, and year. Effects on teens married at conception were limited. However, teen mothe...

http://www.nber.org/papers/w21612 We develop a model of self-sustaining discrimination in wages, coupled with higher unemployment and shorter employment duration among blacks. While white workers are hired and retained indefinitely without monitoring, black workers are monitored and fired if a negative signal is received. The fired workers, who re...

In his valuable contribution, After Civil Rights, John Skrentny shows that in many sectors of the labor market, race is used in ways that were unanticipated when the 1964 Civil Rights Act was enacted. With separate chapters on the professions and business, the public sector, media and entertainment, and the low-skill market, he demonstrates that th...

Using the Beginning Post-Secondary Student Survey and Transcript Data, we find no statistically significant differential return to Certificates or Associate's degrees between for-profits and not-for-profits. Point estimates suggest a slightly lower return to a for-profit Certificate and a slightly higher return to a for-profit Associate's degree, l...

Miscarriage, even if biologically random, is not socially random. Willingness to abort reduces miscarriage risk. Because abortions are favorably selected among pregnant teens, those miscarrying are less favorably selected than those giving birth or aborting but more favorably selected than those giving birth. Therefore, using miscarriage as an inst...

Little is known about how the miscarriage rate has changed over the past few decades in the United States. Data from Cycles IV to VI of the National Survey of Family Growth (NSFG) were used to examine trends from 1970 to 2000. After accounting for abortion availability and the characteristics of pregnant women, the rate of reported miscarriages inc...

Using the Beginning Postsecondary Student Survey, we examine the effect on earnings of obtaining certificates/degrees from for-profit, not-for-profit, and public institutions. Students who enter certificate programs at any type of institution do not gain from earning a certificate. However, among those entering associates degree programs, there are...

Although both economists and psychometricians typically treat them as interval scales, test scores are reported using ordinal scales. Using the Early Childhood Longitudinal Study and the Children of the National Longitudinal Survey, we examine the effect of order-preserving scale transformations on the evolution of the black-white reading test scor...

In this paper we compare the labor market performance of Israeli students who graduated from one of the leading universities, Hebrew University (HU), with those who graduated from a professional undergraduate college, College of Management Academic Studies (COMAS). Our results support a model in which employers have good information about the quali...

We analyze a firm's job-assignment and worker-monitoring decisions when workers face occasional crises. Firms prefer to assign good workers to a difficult task and to not employ bad workers. Firms observe failures but only observe successfully resolved crises if they monitor the worker. If monitoring costs are positive but sufficiently small, for a...

1We are grateful to participants in seminars at the University of Rochester and

We review theories of race discrimination in the labor market. Taste-based models can generate wage and unemployment duration differentials when combined with either random or directed search even when strong prejudice is not widespread, but no existing model explains the unemployment rate differential. Models of statistical discrimination based on...

One of the potential strengths of the No Child Left Behind (NCLB) Act enacted in 2002 is that the law requires the production of an enormous amount of data, particularly from tests, which, if used properly, might help us improve education. As an economist and as someone who served 13 years on the School Committee1 in Brookline Massachusetts, until...

We show that increasing the probability of obtaining a job offer through the network should raise the observed mean wage in jobs found through formal (non-network) channels relative to that in jobs found through the network. This prediction also holds at all percentiles of the observed wage distribution, except the highest and lowest. The largest c...

Partly in response to increased testing and accountability, states and districts have been raising the minimum school entry age, but existing studies show mixed results regarding the effects of entry age. These studies may be severely biased because they violate the monotonicity assumption needed for LATE. We propose an instrument not subject to th...

We show that among workers whose network is weaker than formal (nonnetwork) channels, those finding a job through the network should have higher wages than those finding a job through formal channels. Moreover, this wage differential is decreasing in network strength. We test these implications using a survey of recent immigrants into Canada. At le...

Using a unique sample of Russian immigrants and native Israelis, we examine the return to English knowledge. Panel and cross-section estimates of the return to English are substantial for highly educated immigrants and natives. Hebrew and English language acquisition contribute to immigrant/native earnings convergence, but most convergence is expla...

We examine inference in panel data when the number of groups is small, as is typically the case for difference-in-differences estimation and when some variables are fixed within groups. In this case, standard asymptotics based on the number of groups going to infinity provide a poor approximation to the finite sample distribution. We show that in s...

Many ideas about poverty and discrimination are nothing more than politically driven assertions unsupported by evidence. And even politically neutral studies that do try to assess evidence are often simply unreliable. In Poverty and Discrimination , economist Kevin Lang cuts through the vast literature on poverty and discrimination to determine wha...

Many ideas about poverty and discrimination are nothing more than politically driven assertions unsupported by evidence. And even politically neutral studies that do try to assess evidence are often simply unreliable. In Poverty and Discrimination, economist Kevin Lang cuts through the vast literature on poverty and discrimination to determine what...

We examine the effect of teenage childbearing on the adult outcomes of a sample of women who gave birth, miscarried or had an abortion as teenagers. If miscarriages are (conditionally) random, then if all miscarriages occur before teenagers can obtain abortions, using the absence of a miscarriage as an instrument for a live birth provides a consist...

We propose a model that combines statistical discrimination and educational sorting that explains why blacks get more education than do whites of similar cognitive ability. Our model explains the di¤erence between blacks and whites in the relations between education and AFQT and between wages and education. It cannot easily explain why, conditional...

We develop a model in which firms hire heterogeneous workers but must offer all workers insurance benefits under similar terms. In equilibrium, some firms offer free health insurance, some require an employee premium payment and some do not offer insurance. Making the employee contribution pre-tax lowers the cost to workers of a given employee prem...

We analyze race discrimination in labor markets in which wage offers are posted. If employers with job vacancies receive multiple applicants, they choose the most qualified but may choose arbitrarily among equally qualified applicants. In the model, firms post wages, workers choose where to apply, and firms decide which workers to hire. Labor-marke...

We examine the effect of Proposition 212 on revenues and housing prices in Massachusetts. Communities that were initially constrained by the law saw large increases in state aid and the use of fees. We use these initial constraints as instruments for changes in other components of revenue while treating the change in the property tax as exogenously...

ABSTRACT We examine the effect of Proposition 2½ on revenues and housing prices in Massachusetts. Communities that were initially constrained by the law, saw large increases in state aid and the use of fees. We use these initial constraints as instruments for changes in other components of revenue while treating the change in the property tax as ex...

This article examines nonsequential search when jobs vary with respect to nonpecuniary characteristics. In the presence of frictions in the labor market, the equilibrium job distribution need not show evidence of compensating wage differentials. The model also generates several pervasive features of labor markets: unemployment and vacancies, appare...

Most integration programs transfer students between schools within districts. In this paper, we study Metco, a long-running desegregation program that sends mostly Black students out of the Boston public school district to attend schools in more affluent suburban districts. Metco increases the number of Black students in receiving districts dramati...

Under the standard competitive model, a tax change affecting workers with highly inelastic labor supply, will lower earnings by the entire nominal employer share of the tax increase. If wages play a motivational role but the market still clears, the range of possible outcomes is broader but wages should still not rise if the tax is nominally divide...

We present models of labor-market discrimination in which identical employers choose among job applicants according to a continuous characteristic such as skin color or worker height. The characteristic in question is assumed to be unrelated to worker productivity. Firms are required to announce wage offers that are not conditioned on the character...

Most integration programs transfer students between schools within districts. In this paper, we study the impact of Metco, a long-running desegregation program that sends mostly black students out of the Boston public school district to attend schools in more affluent suburban districts. We focus on the impact of Metco on the students in one of the...

Pischke for helpful comments. The usual caveat applies. 1 1 DiNardo and Pischke are careful only to conclude that their work undermines the argument that people are paid directly for computer skills and not to draw overly strong conclusions from their exercise. However, their paper has been widely interpreted more strongly.

It is widely recognized that children who grow up without a biological parent do worse, on average, than other children. However, because having a single parent is highly correlated with many other socioeconomic disadvantages, the negative outcomes might be caused by something beyond the parent's absence. Econometric tests using a variety of backgr...

Perfect-information, Rubinstein-style bargaining models are used to explore questions about multiple-issue bargaining - Is it ever sensible to offer on only a subset of the issues being bargained? What is the effect of limiting offers so that they must cover all issues? We conclude that in realistic settings the answer to the first question is yes...

We examine how language acquisition affects immigrant earnings growth for Soviet immigrants to Israel. Using retrospective information on linguistic proficiency to control for heterogeneous ability, we find that language complements high-skill occupations. Improved Hebrew accounts for 2/3 to 3/4 of the differential in earnings growth between immigr...

Recent research casts doubt on the view that minimum-wage laws reduce employment. We show that in a simple model of bilateral search with heterogeneous workers, a minimum-wage law increases employment. However, the increased competition from higher productivity workers makes lower productivity workers worse off without making higher productivity wo...

Using Italian Social Security records for male workers from a sample of firms in Turin from 1981 to 1983, the authors show that, conditional on the worker's own wage, the average wage in the establishment for similar workers is negatively related to quits. They also find that this variable predicts future wage growth. This is consistent with an eco...

Prior to trade liberalization in the l980s, New Zealand heavily protected low-wage industries. Consequently, trade liberalization was desirable from the perspective of both traditional and new trade theories. While liberalization decreased employment in protected industries somewhat, it also significantly affected wages, noticeably diminishing the...

We examine twin mysteries - the high correlation between Canadian and US unemployment rates and the emergence of a gap between these rates around 1982. We argue that the apparent close relationship between the unemployment rates and the sudden emergence of a gap are statistically spurious, because both rates are highly persistent. When we differenc...

The paper focuses on satisfaction with income and proposes a utility model built on two value systems, the `Ego' system - described as one own income assessment relatively to one own past and future income - and the `Alter' system - described as one own income assessment relatively to a reference group. We show how the union of these two value syst...

We model partnerships as mutual insurance associations in which individuals band together to insure themselves against idiosyncratic shocks to their human capital. As with most forms of insurance, this generates a tradeoff between efficiency and risk sharing. Since partners keep only a fraction of the profits they generate, they will supply less-th...

Over half of workers are dissatisfied with the number of hour they work and of these the vast majority desire more rather than fewer hours. Using the Canadian Survey of Work Reduction, the authors examine two potential explanations for hours constraints--long-term contracts due to worker moral-hazard or specific-capital and implicit contracts in wh...

This study analyzes the effects of right-wing extremism on the well-being of immigrants based on data from the German Socio-Economic Panel (SOEP) for the years 1984 to 2006 merged with state-level information on election outcomes. The results show that the life satisfaction of immigrants is significantly reduced if right-wing extremism in the nativ...

Since applying for jobs is costly, workers prefer applying where their employment probability is high and, therefore, to jobs attracting fewer higher quality applicants. Since creating vacancies is expensive, firms create more vacancies when job-seeking is high. Our model captures these ideas and accounts for worker heterogeneity by assuming three...

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I reconsider various methods for correcting for bias in estimates of the returns to schooling. I argue that the literature on ability bias has ignored complications implicit in theoretical formulations of the choice of human capital. In particular, such models imply that adding ability to the wage equation may not be informative about the importanc...

Lifetime contracts imply that at a given time, wages and value of marginal product (VMP) will diverge. The contract will specify hours as well as wages, since firms will desire to prevent workers from working more when the wage is greater than VMP and from working less when the wage is less than VMP. If hours are set efficiently, workers will face...

We argue that Labor Market Segmentation theory is a good alternative to standard views of the labor market. Since it is sometimes argued that labor market segmentation theory is untestable, we first consider the uses of theory and the attributes of a good theory. We then argue that labor market segmentation has these attributes. It is internally co...

This paper briefly reviews the empirical evidence on labor market segmentation and presents some new results on the similarity of the pattern of segmentation across 66 different countries. The paper goes on to consider how unemployment might be understood in a labor market segmentation framework. Existing models of unemployment in a dual labor mark...

The authors develop an estimator that allows them to calculate an upper bound to the fraction of unrejected null hypotheses tested in economics journal articles that are in fact true. Their point estimate is that none of the unrejected nulls in their sample is true. The authors reject the hypothesis that more than one-third are true. They consider...

Sri Lanka has a significant chronic unemployment problem. Depending on time period and the definition of unemployment it varies from the low teens to over twenty percent. Nearly all of this unemployment is concentrated among young people who are looking for their first job. Unemployment duration is very long with typical spells lasting four years o...

We develop a symmetric-information auction model of multiproject contracting with costly bidding and increasing marginal performance costs. When there are many potential contractors or only one job, there is a zero-expected-profit symmetric equilibrium in mixed strategies. The winning bid at this equilibrium tends to rise (perversely) with the numb...

It is costly for firms' offers to workers to be turned down both because firms must make additional offers and making offers is costly, and because capital is underused or unused. Provided that workers apply to at least two firms for jobs, there will be wage dispersion in equilibrium and some workers will randomly fail to receive any wage offers. F...

Almost all labor-supply models are estimated under the assumption that workers are free to choose their hours. However, theory, casual empiricism, and survey data suggest that many workers are not free to vary the hours within a job. Consequently, labor-supply estimates based on actual hours of work may be biased. Using Canadian data on desired hou...

Efficiency wage models, in which firms find it profitable to pay wages above workers' reservation wages, provide a promising explanation for unemployment and interindustry wage differentials. One criticism of such models is that they imply firms should sell jobs by requiring up-front bonds from new workers. However, only some efficiency wage models...

In his seminal analysis of the economics of crime, Gary Becker (1968) pointed out that the cost of achieving any given degree of deterrence is minimized by combining an infinitesimal probability of detection and an arbitrarily large punishment. In Kolm’s (1973) phrase, an optimizing government ‘should hang tax evaders with probability zero’. While...

This paper offers some observations on employee crime, economic theories of crime, limits on bonding, and the efficiency wage hypothesis. We demonstrate that the simplest economic theories of crime predict that profit-maximizing firms should follow strategies of minimal monitoring and large penalties for employee crime. Finding overwhelming empiric...

Lazear argues that hours constraints and mandatory retirement form part of an efficient contract which inhibits worker shirking. He argues that initially workers earn less than their VMP and must work more than they want while later they earn more than their VMP and must work less. However, if bonding is costly, incentive compatibility requires tha...

The simplest economic theories of crime predict that profit-maximizing firms should follow strategies of minimal monitoring with large penalties for employee crime. We investigate possible reasons why firms actually spend considerable resources trying to detect employee malfeasance. We find that the most plausible explanations for firms' large outl...

Almost all labor supply models are estimated under the assumption that workers are free to choose their hours. However, theory, casual empiricism and survey data suggest that many workers are not free to vary the hours within a job. Consequently, labor supply estimates based on actual hours of work may be biased. Using Canadian data on desired hour...

Studies of the earnings of union workers have consistently shown that they earn considerably more than nonunion workers. This paper considers whether part of this observed union/nonunion differential is due to unions organizing high paying primary sector jobs. We extend our earlier work on the dual labor market in which we used an unknown regime sw...

In any hedonic system in which consumers purchase a characteristic embodied in a good, consumers with strong tastes for the characteristic are matched with producers with low costs of producing it. This paper demonstrates that, as a result of this matching process, the "exogenous" variables in the supply e quation cannot be used as instruments in t...

We subject our dual labor market model to a goodness of test fit and compare the results with those obtained using a single equation model with a complex error structure. The dual labor market does an excellent job of predicting the wage distribution except for failing to explain bunching at $7.50 and $10.00 per hour. The null hypothesis that the m...

Lazear has argued that hours constraints, in general, and mandatory retirement, in particular, form part of an efficient labor market contract designed to increase output by inhibiting worker shirking. Since the contract is efficient, legislative interference is welfare reducing. However, in any case where bonding is costly, the hours constraints w...

In Becker's model, punishment is not constrained by a normative ‘socially acceptable’ level. Carr-Hill and Stern show that the justice system requires a concept of ‘appropriate’ punishment which places either an upper bound on punishment or a cost of deviating from the ‘appropriate’ penalty. We estimate the social loss function implicitly minimized...

Neoclassical theory has been misrepresented in the segmented economy literature. Consequently, most tests of "structural" vs. "neoclassical" models are inadequate. Moreover, segmented economy theorists have concentrated on the least significant departures of segmented models from neoclassical economics. In fact, neoclassical economists have develop...

By increasing the expected wage in low skill jobs, a minimum wage law can reduce the incentive for low skill workers to imitate high skill workers in the signaling process. The gain from reduced investment in the signal can more than offset the loss from unemployment among low skill workers so that total output increases. Moreover, with an appropri...

This study analyzes the effects of right-wing extremism on the well-being of immigrants based on data from the German Socio-Economic Panel (SOEP) for the years 1984 to 2006 merged with state-level information on election outcomes. The results show that the life satisfaction of immigrants is significantly reduced if right-wing extremism in the nativ...

Efficiency wage models have been criticized because worker malfeasance can be prevented in a pareto efficient manner by requiring workers to post a bond which they lose if they are caught cheating. However, since it is costly to monitor workers and costless to demand a larger bond, firms should pay nothing for monitoring and demand very large bonds...

Any advanced industrial society is composed of a number of speech communities with different verbal and nonverbal languages. In particular, in the United States blacks and whites and men and women have sharply differing methods of speaking and listening. This paper develops a model in which people can only work together if they “speak” the same lan...

Under the educational sorting hypothesis a state compulsory school attendance law will increase the educational attainment of high-ability workers who are not directly affected by the law. Under the human capital hypothesis such laws affect only those individuals whose behavior is directly constrained. We find that compulsory attendance laws do inc...

A simple econometric model of investment in schooling is developed and estimated. The measure of individual discount rates implicit in their educational investment decisions suggests no difference between individuals from different socioeconomic backgrounds. Differences in individual speeds of educational attainment, which do vary with background,...

This article presents the analysis of intake dispositions for a sample of 533 juvenile suspects. By using multinomial logit analysis, we found strong statistical confirmation of the relevance of prior record and demeanor of youth during intake for the selection of intake options by officers in Los Angeles County. The analysis indicates that when ot...

This paper replicates and extends our earlier analysis of dual market theory. We use a technique which estimates for each worker a probability of being in the primary sector on the basis of his characteristics. We use this information to determine the occupational and industrial composition of the sectors. We continue to produce results which are v...

Despite substantial differences in their views of the appropriate policy response to the existence of poverty, neither the proponents of dual market theory nor its critics have proposed potentially conclusive tests of the dual market hypothesis.This paper presents a test of the two central propositions of dual market theory -- 1) the existence of t...

Wages generally rise more slowly with experience in union than in nonunion settings. It has been argued that the lower slope of the earnings profiles reflects the preferences of the median worker. It is shown in this paper that the median worker model (assuming a median worker exists) does not lead to a uniformly less steeply sloped earnings profil...