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Persistence of Interindustry Wage Differentials: A Reexamination Using Matched Worker‐Firm Panel Data

Journal of Labor Economics 1999 17(3), 492-533
We estimate interindustry wage differentials using new French longitudinal data that allow a tracking of workers and their firms over time. We find that, when measured on a cross‐sectional basis, they primarily reflect the interindustry variations in unmeasured labor quality. However, interindustry wage differentials are only a minor component of interfirm wage differentials. The average differential in wages paid to the same workers by different firms is about 20%–30%. In a given industry, wage policies are more favorable to workers in large, capital‐intensive firms.

Partial Identification in Monotone Binary Models: Discrete Regressors and Interval Data

Review of Economic Studies 2008 75(3), 835-864
We investigate identification in semi-parametric binary regression models, y = 1(xβ+υ+ε > 0) when υ is either discrete or measured within intervals. The error term ε is assumed to be uncorrelated with a set of instruments z, ε is independent of υ conditionally on x and z, and the support of −(xβ + ε) is finite. We provide a sharp characterization of the set of observationally equivalent parameters β. When there are as many instruments z as variables x, the bounds of the identified intervals of the different scalar components βk of parameter β can be expressed as simple moments of the data. Also, in the case of interval data, we show that additional information on the distribution of υ within intervals shrinks the identified set. Specifically, the closer the conditional distribution of υ given z is to uniformity, the smaller is the identified set. Point identified is achieved if and only if υ is uniform within intervals.

The Decline in Demand for Unskilled Labor: An Empirical Analysis Method and its Application to France

The Review of Economics and Statistics 2000 82(4), 596-607
The decline in the unskilled share of French employment is chiefly due to the slackness of domestic demand for those industries with the highest proportion of unskilled workers. The spread of computers has not been particularly conducive to substitution between skilled and unskilled labor. We test and accept the hypothesis of technical-progress neutrality within French industries. The mechanisms that generate inequality do not appear to be the same in France and in the United States. The source of inequality isn't so much technical progress per se as its interaction with the institutions that regulate the labor market.

A Pleasure That Hurts: The Ambiguous Effects of Elite Tutoring on Underprivileged High School Students

Journal of Labor Economics 2020 38(2), 501-533
This paper reports findings from a randomized evaluation of an intensive tutoring program conducted in underprivileged high schools. Within each school, the intervention targets students identified as having the ability to pursue a college education. The program is designed to strengthen their readiness for higher education. We demonstrate that such an intervention can have negative effects on a large fraction of participants, even though participation is entirely voluntary. This result is consistent with a simple model where time invested in extracurricular programs and time invested in homework represent imperfect substitutes in the education production function.

Following the Crowd: Leisure Complementarities beyond the Household

Journal of Labor Economics 2017 35(4), 1061-1088
Leisure externalities across households have important implications for labor market regulations but have proven very difficult to identify. This paper exploits the unique features of school holidays and paid leave regulations in France to show that exogenous increases in the amount of leisure time enjoyed by workers living with children induce very significant increases in the demand for leisure of workers living in other households. We also provide evidence that these cross effects are driven by complementarities in nonmarket time rather than workplace norms or workplace externalities.

Vive la Révolution! Long‐Term Educational Returns of 1968 to the Angry Students

Journal of Labor Economics 2008 26(1), 1-33
The famous events of May 1968, starting with student riots, threw France into a state of turmoil. As a result, normal examination procedures were abandoned, and the pass rate for various qualifications increased enormously. The lowering of thresholds at critical stages of the education system enabled a proportion of students to pursue more years of higher education than would otherwise have been possible. For those on the margin of passing their examinations, additional years of higher education increased future wages and occupational levels. Interestingly, the effect is also transmitted across generations and is reflected in the educational performance of children.

Changes in the Functional Structure of Firms and the Demand for Skill

Journal of Labor Economics 2004 22(3), 639-664
We analyze recent changes in the occupational structure of French manufacturing firms. Firms employ a greater proportion of engineers working on the design and marketing of new products and a lower proportion of high‐skill experts working in administration‐related activities. Firms have also reduced the share of production‐related activities at both the levels of high‐skill and low‐skill workers. We develop a labor demand model that shows the role played by technological change. New technologies make it possible to allocate more human resources to the activities that are the most difficult to program in advance.

Worktime Regulations and Spousal Labor Supply

American Economic Review 2014 104(1), 252-276 open access
We study interdependencies in spousal labor supply by exploiting the design of the French workweek reduction, which introduced exogenous variation in one's spouse's labor supply, at constant earnings. Treated employees work on average two hours less per week. Husbands of treated women respond by reducing their labor supply by about half an hour, consistent with substantial leisure complementarity, and specifically cut the nonusual component of their workweek, leaving usual hours unchanged. Women's response to their husband's treatment is instead weak and rarely statistically significant, possibly due to heavier constraints in the organization of their workweek.

Set Identified Linear Models

Econometrica 2012 80(3), 1129-1155
Before quoting, please ask for the fully revised version We analyze the identification and estimation of parameters β satisfying the incomplete linear moment restrictionsE(z>(xβ−y)) = E(z>u(x))where z is a set of instruments and u(z) an unknown bounded scalar function. We first provide empirically relevant examples of such a set-up. Second, we show that these conditions set identify β where the identified set B is bounded and convex. We provide a sharp characterization of the identified set not only when the number of moment conditions is equal to the number of parameters of interest but also in the case in which the number of conditions is strictly larger than the number of parameters. We derive a necessary and sufficient condition of the validity of supernumerary restrictions, which generalizes the familiar Sargan condition. Third, we provide new results on the asymptotics of analog estimates. When B is a strictly convex set, we also construct a test of the null hypothesis, β0 ∈ B, whose level is asymptotically exact and which relies on the minimization of the support function of the set B −β0. Inverting this test makes it possible to construct confidence regions with uniformly exact coverage probabilities. Results of some Monte Carlo experiments are presented.

The Value of a High School GPA

The Review of Economics and Statistics 2026 108(3), 833-841 open access
This paper provides novel evidence on the causal effect of high school Grade Point Average (GPA) on the human capital development and labor market trajectory of individuals. Causal identification is achieved by exploiting a unique feature of the Norwegian education system that produces exogenous variation in GPA among high school students. We find little effect on the number of completed years of higher education, but significant effects on the number and quality of higher education programs available to students after high school. Most importantly, we find persistent effects on students’ long-run labor market outcomes, most notably market wage.