The low number of college graduates with science degrees - particularly among under-represented minorities - is of growing concern. We examine differences across universities in graduating students in different fields. Using student-level data on the University of California system during a...

We examine the impact of air pollution on infant death in California over the 1990s. Our work offers several innovations: First, many previous studies examine populations subject to far greater levels of pollution. In contrast, the experience of California in the 1990s is clearly relevant to...

Using recent data from southern California and Mexico we challenge the notion that the demographic profile of post-1970 Mexican migrants to the United States has remained constant. We find that more recent cohorts of migrants: (1) are more likely to settle permanently in the United States, (2)...

Considerable research attention has been devoted to the question of whether and to what extent changes in welfare policy legislated in the 1990s might have deterred immigrant participation in welfare programs, although only post-1996 immigrants were explicitly targeted by most of the changes....

In Silicon Valley's computer cluster, skilled employees are reported to move rapidly between competing firms. This job-hopping facilitates the reallocation of resources towards firms with superior innovations, but it also creates human capital externalities that reduce incentives to invest in...

A great deal of attention has been paid in the literature to estimating the impacts of training programs. Much less attention has been devoted to how training agencies assign participants to training programs, and to how these allocation decisions vary with agency resources, the initial skill...

Although a huge literature spanning several disciplines documents an association between poverty and child abuse, researchers have not found persuasive evidence that economic downturns increase abuse, despite their impacts on family income. In this paper, we address this seeming contradiction....

In this paper, I examine the impact of uninsured patients on the health of the insured, focusing on one health outcome - the in-hospital mortality rate of insured heart attack patients. I employ panel data models using patient discharge and hospital financial data from California (1999-2006). My...

Using data on 24 teachers and 982 students from a 2006 survey of California high school economics classes, we assess the effects of student and teacher characteristics on student achievement. We estimate value-added models of outcomes on multiple choice and essay exams, with matched classroom...

This analysis uses March Current Population Survey data from 1999-2010 and a differences-in-differences approach to examine how California's first in the nation paid family leave (PFL) program affected leave-taking by mothers following childbirth, as well as subsequent labor market outcomes. We...