Showing papers in "Handbook of Labor Economics in 2010"

Decomposition methods in economics

Abstract: This chapter provides a comprehensive overview of decomposition methods that have been developed since the seminal work of Oaxaca and Blinder in the early 1970s. These methods are used to decompose the difference in a distributional statistic between two groups, or its change over time, into various explanatory factors. While the original work of Oaxaca and Blinder considered the case of the mean, our main focus is on other distributional statistics besides the mean, such as quantiles, the Gini coefficient or the variance. We discuss the assumptions required for identifying the different elements of the decomposition, as well as various estimation methods proposed in the literature. We also illustrate how these methods work in practice by discussing existing applications and working through a set of empirical examples throughout the paper.

Recent Developments in Intergenerational Mobility

Abstract: NBER WORKING PAPER SERIESRECENT DEVELOPMENTS IN INTERGENERATIONAL MOBILITYSandra E. BlackPaul J. DevereuxWorking Paper 15889http://www.nber.org/papers/w15889NATIONAL BUREAU OF ECONOMIC RESEARCH1050 Massachusetts AvenueCambridge, MA 02138April 2010Prepared for the Handbook of Labor Economics. We would like to thank Anders Bjorklund, DanHamermesh, Helena Holmlund, Kanika Kapur, Gary Solon, Alexandra Spitz-Oener, and Steve Trejofor helpful comments. Prudence Kwenda provided excellent research assistance. Devereux thanksthe Irish Research Council for the Humanities and Social Sciences (IRCHSS) for financial support.This chapter was completed while Black was on leave at the Department of Economics, Universityof Texas, Austin. The views expressed herein are those of the authors and do not necessarily reflectthe views of the National Bureau of Economic Research.© 2010 by Sandra E. Black and Paul J. Devereux. All rights reserved. Short sections of text, not toexceed two paragraphs, may be quoted without explicit permission provided that full credit, including© notice, is given to the source.

Human Resource Management and Productivity

Abstract: In this chapter we examine the relationship between Human Resource Management (HRM) and productivity. HRM includes incentive pay (individual and group) as well as many non-pay aspects of the employment relationship such as matching (hiring and firing) and work organization (e.g. teams, autonomy). We place HRM more generally within the literature on management practices and productivity. We start with some facts on levels and trends of both HRM and productivity and the main economic theories of HRM. We look at some of the determinants of HRM—risk, competition, ownership and regulation. The largest section analyzes the impact of HRM on productivity emphasizing issues of methodology, data and results (from micro-econometric studies). We conclude briefly with suggestions of avenues for future frontier work.

Earnings, consumption and lifecycle choices

Abstract: We discuss recent developments in the literature that studies how the dynamics of earnings and wages affect consumption choices over the life cycle. We start by analyzing the theoretical impact of income changes on consumption—highlighting the role of persistence, information, size and insurability of changes in economic resources. We next examine the empirical contributions, distinguishing between papers that use only income data and those that use both income and consumption data. The latter do this for two purposes. First, one can make explicit assumptions about the structure of credit and insurance markets and identify the income process or the information set of the individuals. Second, one can assume that the income process or the amount of information that consumers have are known and test the implications of the theory. In general there is an identification issue that has only recently being addressed with better data or better “experiments”. We conclude with a discussion of the literature that endogenizes people’s earnings and therefore change the nature of risk faced by households.

Field experiments in labor economics

Abstract: We overview the use of field experiments in labor economics. We showcase studies that highlight the central advantages of this methodology, which include: (i) using economic theory to design the null and alternative hypotheses; (ii) engineering exogenous variation in real world economic environments to establish causal relations and learn about the underlying mechanisms; and (iii) engaging in primary data collection and often working closely with practitioners. To highlight the potential for field experiments to inform issues in labor economics, we organize our discussion around the individual life cycle. We therefore consider field experiments related to the accumulation of human capital, the demand and supply of labor, and behavior within firms, and close with a brief discussion of the nascent literature of field experiments related to household decision making.

Lab Labor: What Can Labor Economists Learn from the Lab?

Abstract: This chapter surveys the contributions of laboratory experiments to labor economics. We begin with a discussion of methodological issues: when (and why) is a lab experiment the best approach; how do laboratory experiments compare to field experiments; and what are the main design issues? We then summarize the substantive contributions of laboratory experiments to our understanding of principal-agent interactions, social preferences, union-firm bargaining, arbitration, gender differentials, discrimination, job search, and labor markets more generally.

Search in Macroeconomic Models of the Labor Market

Abstract: This chapter assesses how models with search frictions have shaped our understanding of aggregate labor market outcomes in two contexts: business cycle fluctuations and long-run (trend) changes. We first consolidate data on aggregate labor market outcomes for a large set of OECD countries. We then ask how models with search improve our understanding of these data. Our results are mixed. Search models are useful for interpreting the behavior of some additional data series, but search frictions per se do not seem to improve our understanding of movements in total hours at either business cycle frequencies or in the long-run. Still, models with search seem promising as a framework for understanding how different wage setting processes affect aggregate labor market outcomes.

Personnel economics: hiring and incentives

Abstract: We survey the Personnel Economics literature, focusing on how firms establish, maintain, and end employment relationships and on how firms provide incentives to employees. This literature has been very successful in generating models and empirical work about incentive systems. Some of the unanswered questions in this area -- for example, the empirical relevance of the risk/incentive tradeoff and the question of whether CEO pay arrangements reflect competitive markets and efficient contracting -- are likely to be very difficult to answer due to measurement problems. The literature has been less successful at explaining how firms can find the right employees in the first place. Economists understand the broad economic forces -- matching with costly search and bilateral asymmetric information -- that firms face in trying to hire. But the main models in this area treat firms as simple black-box production functions. Less work has been done to understand how different firms approach the hiring problem, what determines the firm-level heterogeneity in hiring strategies, and whether these patterns conform to theory. We survey some literature in this area and suggest areas for further research.

Program Evaluation and Research Designs

Abstract: This chapter provides a selective review of some contemporary approaches to program evaluation. One motivation for our review is the recent emergence and increasing use of a particular kind of “program” in applied microeconomic research, the so-called Regression Discontinuity (RD) Design of Thistlethwaite and Campbell (1960) . We organize our discussion of these various research designs by how they secure internal validity: in this view, the RD design can been seen as a close “cousin” of the randomized experiment. An important distinction which emerges from our discussion of “heterogeneous treatment effects” is between ex post (descriptive) and ex ante (predictive) evaluations; these two types of evaluations have distinct, but complementary goals. A second important distinction we make is between statistical statements that are descriptions of our knowledge of the program assignment process and statistical statements that are structural assumptions about individual behavior. Using these distinctions, we examine some commonly employed evaluation strategies, and assess them with a common set of criteria for “internal validity”, the foremost goal of an ex post evaluation. In some cases, we also provide some concrete illustrations of how internally valid causal estimates can be supplemented with specific structural assumptions to address “external validity”: the estimate from an internally valid “experimental” estimate can be viewed as a “leading term” in an extrapolation for a parameter of interest in an ex ante evaluation.

Racial Inequality in the 21st Century: The Declining Significance of Discrimination

Abstract: There are large and important differences between blacks in whites in nearly every facet of life— earnings, unemployment, incarceration, health, and so on. This chapter contains three themes. First, relative to the 20th century, the significance of discrimination as an explanation for racial inequality across economic and social indicators has declined. Racial differences in social and economic outcomes are greatly reduced when one accounts for educational achievement; therefore, the new challenge is to understand the obstacles undermining the development of skill in black and Hispanic children in primary and secondary school. Second, analyzing ten large datasets that include children ranging in age from eight months old seventeen years old, we demonstrate that the racial achievement gap is remarkably robust across time, samples, and particular assessments used. The gap does not exist in the first year of life, but black students fall behind quickly thereafter and observables cannot explain differences between racial groups after kindergarten. Third, we providea brief history of efforts to close the achievement gap. There are several programs—various early childhood interventions, more flexibility and stricter accountability for schools, data-driven instruction, smaller class sizes, certain student incentives, and bonuses for effective teachers to teach in high-need schools, which have a positive return on investment, but they cannot close the achievement gap in isolation. More promising are results from a handful of high-performing charter schools, which combine many of the investments above in a comprehensive framework and provide an “existence proof’’—demonstrating that a few simple investments can dramatically increase the achievement of even the poorest minority students. The challenge for the future is to take these examples to scale.

Great Expectations: Law, Employment Contracts, and Labor Market Performance

Abstract: This chapter reviews the literature on employment and labor law. The goal of the review is to understand why every jurisdiction in the world has extensive employment law, particularly employment protection law, while most economic analysis of the law suggests that less employment protection would enhance welfare. The review has three parts. The first part discusses the structure of the common law and the evolution of employment protection law. The second part discusses the economic theory of contract. Finally, the empirical literature on employment and labor law is reviewed. I conclude that many aspects of employment law are consistent with the economic theory of contract - namely, that contracts are written and enforced to enhance ex ante match efficiency in the presence of asymmetric information and relationship specific investments. In contrast, empirical labor market research focuses upon ex post match efficiency in the face of an exogenous productivity shock. Hence, in order to understand the form and structure of existing employment law we need better empirical tools to assess the ex ante benefits of employment contracts.