This article decomposes the participation process of a prototypical program into eligibility, awareness, application, acceptance, and enrollment. With this decomposition, we determine the sources of unequal participation for different groups and demonstrate that variables often have very different effects at different stages in the participation process. Our analysis shows that personal choices substantially affect participation and that awareness of program eligibility is a major source of variation in participation.

Wages for black and white workers are substantially lower in occupations with a high density of black employees, following standard controls. Such correlations can exist absent discrimination or as a result of discrimination. In wage level equations, partial correlations fall sharply after controlling for occupational skills. Longitudinal estimates accounting for worker heterogeneity indicate little wage change associated with changes in racial composition. Results support a “quality sorting” rather than discrimination explanation, with racial density serving as an index of unmeasured skills. Discrimination reflected in racial wage gaps occurs within occupations or across occupations in a manner uncorrelated with racial composition.

Using a confidential version of the NLSY79, we estimate large effects of neighborhood social characteristics and job proximity on labor market activity. A variety of neighborhood social characteristics are associated with less market work. Social characteristics have nonlinear effects, with the greatest impact in the worst neighborhoods. Social characteristics are also more important for less‐educated workers. Exploiting the panel aspects of our data, we find that estimates that do not account for neighborhood selection on the basis of time‐invariant and time‐varying unobserved individual characteristics substantially overstate the social effects of neighborhoods but understate the effects of job access.