After going from doctor to doctor, I tried to think of how the doctors must have felt…. This is
what I think:“This woman is presenting this odd disease [lymphangioleiomyomatosis] that no …

Linear regressions with period and group fixed effects are widely used to estimate treatment
effects. We show that they estimate weighted sums of the average treatment effects (ATE) in …

This paper argues that incumbent firms may acquire innovative targets solely to discontinue
the target's innovation projects and preempt future competition. We call such acquisitions …

This chapter reviews topics related to the demand for health insurance, including the
question of how choice of health insurance should be structured for consumers. After the first …

The pharmaceutical industry accounts for a substantial chunk of the US economy's research
and development investments, which have resulted in significant medical breakthroughs. At …

Abstract The Medicare Part D program relies on consumer choice to provide insurers with
incentives to offer low‐priced, high‐quality pharmaceutical insurance plans. We …

We examine whether and to what extent consolidation in the US health insurance industry
has contributed to higher employer-sponsored insurance premiums. We exploit the …

We study the demand response to nonlinear price schedules using data on insurance
contracts and prescription drug purchases in Medicare Part D. We exploit the kink in …

This article quantifies the relationship between market size and innovation in the
pharmaceutical industry using improved, and newer, methods and data. We find significant …

Recent evidence suggests that Medicare Part D increased prescription drug use among
seniors, and increased pharmaceutical firms' revenues from sales. Previous studies also …