This paper applies a standard treatment effects model to determine that participation in Freshman Learning Communities (FLCs) improves academic performance and retention. Not controlling for individual self-selection into FLC participation leads one to incorrectly conclude that the impact is the...

This paper uses a unique personnel data set to explore job separation behavior among welfare hires. Our results indicate that welfare hires are no less stable than similar nonwelfare hires; however, time until separation does differ across welfare status by reason for separation. We also found...

The purpose of this paper is to determine whether workers’ commitment to the labor force declined after 9/11, as many popular press accounts at the time suggested it would. The results indicate that any measured decline in hours spent working was the result of economic conditions rather than...

In this paper, we address the issue of spurious correlation in the production of health in a systematic way. Spurious correlation entails the risk of linking health status to medical (and nonmedical) inputs when no links exist. This note first presents the bounds testing procedure as a method to...

This contribution starts out by noting a conflict of interest between consumers and insurers. Consumers face positive correlation in their assets (health, wealth, wisdom, i.e. skills), causing them to demand a great deal of insurance coverage. Insurers on the other hand eschew positively...