Genetically engineered crops and pesticide use in U.S. maize and soybeans.

The widespread adoption of genetically engineered (GE) crops has clearly led to changes in pesticide use, but the nature and extent of these impacts remain open questions. We study this issue with a unique, large, and representative sample of plot-level choices made by U.S.

Playing the Fertility Game at Work: An Equilibrium Model of Peer Effects.

We study workplace peer effects in fertility decisions using a game theory model of strategic interactions among coworkers that allows for multiple equilibria. Using register-based data on fertile-aged women working in medium sized establishments in Denmark, we uncover negative average peer effects. Allowing for heterogeneous effects by worker type, we find that positive effects dominate across worker types defined by age or education.

The effect of physician-hospital affiliations on hospital prices in California.

During the 1990s, a record number of U.S. hospitals entered into some form of vertical combination with physicians.