This dissertation consists of three essays whose unifying topical theme is the study and application of semiparametric methods for the evaluation of social programs. The first essay evaluates the federal urban Empowerment Zone (EZ) program using an inverse probability weighting (IPW)...

This paper analyzes the impact of a leading entrepreneurship education program on college students’ entrepreneurship competencies and intentions using an instrumental variables approach in a difference-in-differences framework. We exploit that the program was offered to students at one...

This paper investigates empirically how five different vocational rehabilitation (VR) programs affect the transition rate into employment, the consecutive monthly earnings and the employment duration. VR programs increase the employment probability of the participants, but this effect varies...

Many empirical questions in economics and other social sciences depend on causal effects of programs or policies. In the last two decades much research has been done on the econometric and statistical analysis of the effects of such programs or treatments. This recent theoretical literature has...

Replaced with revised version of paper 07/25/08.

Following Executive Order 12898 in 1994, federal agencies have taken a variety of steps to incorporate environmental justice (EJ) into their programs and practices. Two scales at which these efforts are critical are regulatory design and enforcement. This study evaluates Regulatory Impact...

This paper studies how individuals exchange information with peers and how this information circulates and spreads through informal channels, focusing on the role of the community as a bridge for information flows. I concentrate on three rural villages in Nepal where an educational radio program...

This paper investigates the effects of five different vocational rehabilitation (VR) programs on the hazard rates into employment, disability and temporarily withdrawals from the labor market for persons who face severe problems in re-entering the labor market, mostly due to medical problems....