We study the welfare effects of offering choice over financial coverage levels--"vertical choice''--in regulated health insurance markets. Though the efficient level of coverage, which trades off the value of risk protection and the social cost from moral hazard, likely varies across consumers,...

The regulated insurance exchanges set up in the Affordable Care Act (ACA) were designed to deliver affordable, efficient health coverage through private insurers. It is crucial to study the complex industrial organization (IO) of these exchanges in order to assess their impacts to date, during...

This paper estimates an imperfect information discrete choice model of drivers' refueling preferences and analyzes the implications of these preferences for electric vehicle (EV) adoption. Drivers respond four times more to stations' long-run average prices than to current prices and value...

In 2016, New York City designed and implemented an intervention reducing frictions in accessing safety-net care: randomly making initial primary care appointments for 2,428 undocumented immigrants. We leverage a novel survey-administrative data linkage to show that the program resulted in a more...

We study how the politicization of policies designed to correct market failures can undermine their effectiveness. The Patient Protection and Affordable Care Act (ACA) was among the most politically divisive expansions of the US government. We examine whether partisanship distorted enrollment...

Legislation often empowers agencies to develop rules, but legal challenges may create uncertainty, thereby increasing firm costs, delaying policy objectives, and affecting externalities. This paper investigates policy uncertainty surrounding the Mercury and Air Toxics Standard, estimating a...

Natural gas has replaced coal as the dominant fuel for U.S. electricity generation. However, U.S. states that regulate electric utilities have retired coal more slowly than others. We build a structural model of rate-of-return regulation during an energy transition where utilities face tradeoffs...

I derive a formula for the equilibrium distribution of markups in the search- theoretic model of imperfect competition of Butters (1977), Varian (1980), and Burdett and Judd (1983). The level of markups and the sign of the relationship between a seller's markup and its size depends on the extent...

We audit the job recommender algorithms used by four Chinese job boards by creating fictitious applicant profiles that differ only in their gender. Jobs recommended uniquely to the male and female profiles in a pair differ modestly in their observed characteristics, with female jobs advertising...

This paper investigates whether and why pensioners move across borders in response to tax rate differentials. In 2013, retirees relocating to Portugal became eligible to a full tax exemption of foreign-source pensions. Contrary to the broadly held belief that seniors "age in place", we find...