Interviews with low-level drug dealers in New York City reveal that the monetary costs of distributing drugs are modest. Hence, the proportion of sales revenue retained by these sellers is a meaningful indicator of their earnings. There are four distinct types of sellers, with systematic...

Interviews with low-level drug dealers in New York City reveal that the monetary costs of distributing drugs are modest. Hence, the proportion of sales revenue retained by these sellers is a meaningful indicator of their earnings. There are four distinct types of sellers, with systematic...

We study the effect of physician incentives in an HMO network. Physician incentives are controversial because they may induce doctors to make treatment decisions that differ from those they would chose in the absence of incentives. We set out a theoretical framework for assessing the degree to...

For introductory presentation of issues involving identification and estimation of simultaneous equation systems, a natural vehicle is a model consisting of supply and demand relationships to explain price and quantity variables for a single good. One would accordingly expect to find in...

In this dissertation, I develop empirical methods, built on the recent advances in industrial organization, to study charitable giving and fundraising in the charity market. In the first essay, we propose a multiple discrete choice model with differentiated charitable products and estimate the...