I study how teachers’ assigned job tasks—the practices they are asked to use in the classroom—affect the returns to math skills in teacher productivity. The results demonstrate the importance of distinguishing between workers’ skills and job tasks. I examine a randomized trial of different approaches to teaching math, each codified in a set of day-to-day tasks. Teachers were tested to measure their math skills. Teacher productivity—measured by student test scores—is increasing in math skills when teachers use conventional “direct instruction”: explaining and modeling rules and procedures. The relationship is weaker, perhaps negative, for newer “student-led” methods.

Data are used from the 1984–2016 Displaced Workers Surveys (DWS) to investigate the incidence and consequences of job loss, 1981–2015. These data show a record high rate of job loss in the Great Recession, with serious employment consequences for job losers, including very low rates of re-employment and difficulty finding full-time employment. The average reduction in weekly earnings for job losers making a full-time–full-time transition are relatively small, with a substantial minority reporting earning more on their new job than on the lost job. Most of the cost of job loss comes from difficulty finding new full-time employment.

This research examines the determinants of the match between high school seniors and postsecondary institutions in the United States. I model college application decisions as a nonsequential search problem and specify a unified structural model of college application, admission, and matriculation decisions that are all functions of unobservable individual heterogeneity. The results indicate that black and Hispanic representation at all 4‐year colleges is predicted to decline modestly—by 2%—if race‐neutral college admissions policies are mandated nationwide. However, race‐neutral admissions are predicted to decrease minority representation at the most selective 4‐year institutions by 10%.

Military deployments and job assignments provide an opportunity to estimate the impact of parental absences and household relocations on children’s academic achievement. Combining U.S. Army personnel data with children’s standardized test scores from Texas, I find that parental absences adversely affect children’s test scores by a tenth of a standard deviation. Likewise, household relocations have modest negative effects on children’s test scores. Both parental absences and household relocations have the greatest detrimental effect on test scores of children with single parents, children with mothers in the army, children with lower‐ability parents, and younger children.

I examine the extent to which workers who lose jobs obtain work in alternative employment arrangements, including temporary work and independent contracting, and obtain voluntary or involuntary part‐time work. I find that job losers are significantly more likely than nonlosers to be in both temporary jobs (including on‐call work and contract work) and involuntarily part‐time jobs. I also find evidence that temporary and involuntary part‐time jobs are part of a transitional process subsequent to job loss leading to regular full‐time employment.

This article develops and tests a simple dynamic model of statistical discrimination. The model improves on earlier static models both by allowing ex ante uncertainty about worker productivity to be resolved as on-the-job performance is observed and by generating several testable empirical implications. These predictions are tested using a sample of young men from the National Longitudinal Survey of Youth, producing mixed evidence for the model. The main empirical result is that no black-white wage gap exists at labor force entry but that one develops as experience accumulates, mainly because blacks reap smaller gains from job mobility.

I use a large sample of jobs from the National Longitudinal Survey of Youth to examine job mobility patterns and to evaluate theories of interfirm worker mobility There are three main findings. First, the monthly hazard of job ending is not monotonically decreasing in tenure as most earlier work using annual data has found, but it increases to a maximum at 3 months and declines thereafter. Second, mobility is strongly positively related to the frequency of job change prior to the start of the job. Finally, job change in the most recent year prior to the start of the job is more strongly related than earlier job change to mobility on the current job. Copyright 1994 by University of Chicago Press.

The dramatic decline in unionization over the last decade is investigated in the context of a supply/demand model of union status determination using data from surveys of workers conducted in 1977 and 1984 along with data from the National Labor Relations Board on representation elections. It is concluded that the decline in unionization since 1977 is accounted for largely by (1) an increase in employer resistance to unionization, probably due to increased product market competitiveness and (2) a decrease in demand for union representation by nonunion workers due to an increase in the satisfaction of nonunion workers with their jobs and a decline in nonunion workers' beliefs that unions are able to improve wages and working conditions.