State governments contract with health maintenance organizations (HMOs) to coordinate medical care for nearly 20 million Medicaid recipients. Identifying the causal effect of HMO enrollment on government spending and health care quality is difficult if, as is often the case, recipients have the...

This paper examines the relationship between gun ownership and crime. Previous research has suffered from a lack of reliable data on gun ownership. I exploit a unique data set to reliably estimate annual gun ownership rates at both the state and the county level during the past two decades. My...

I exploit a plausibly exogenous change in hospital financial incentives to examine whether the behavior of private not-for-profit hospitals varies with the share of nearby hospitals organized as for-profit firms. My results show that not-for-profit hospitals in for-profit intensive areas are...

Chapter 1: The Economic Effects of Medical Innovations: Vioxx and Labor SupplyDespite dramatic improvements in medical technology over time, comparatively little attention has been paid to the effect of these innovations on economic outcomes. This study uses seven overlapping panels of the...

My dissertation is composed of three essays on Development Economics in China. The first chapter, co-authored with Hongbin Li, evaluates the impact of the 8-7 Plan, the second wave of China's poverty alleviation program, on rural income growth at the county level over the period 1994-2000. Since...

How do improvements in information impact market performance? This dissertation examines the effect of an innovative initiative launched by a private company in the central Indian state of Madhya Pradesh. Beginning in October 2000, it set up 1700 internet kiosks and 45 warehouses that provide...

In Chapter 1, we study an intervention in which the Peruvian government provided public payphones to 6,509 rural villages that did not have communication services before. We show that the intervention timing was orthogonal to potential outcomes and exploit it using a panel of treated villages....

The tax base for state unemployment insurance (UI) programs varies significantly in the U.S., from a low of $7,000 annually in California to a high of $52,700 in Washington. Previous research has provided surprisingly little guidance to policy makers regarding the tradeoffs associated with this...