Most health insurance uses cost-sharing to reduce excess utilization. Supplemental insurance can blunt the impact of this cost-sharing, increasing utilization and exerting a negative externality on the primary insurer. This paper estimates the effect of private Medigap supplemental insurance on...

The debate over privatizing Medicare stems from a fundamental disagreement about whether privatization would primarily generate consumer surplus for individuals or producer surplus for insurance companies and health care providers. This paper investigates this question by studying an existing...

Three tax credits benefit households who pay tuition and fees for higher education. The credits have been justified as an investment: generating more educated people and thus more earnings and externalities associated with education. The credits have also been justified purely as tax cuts to...

Rothstein has produced two comments, Rothstein (2003) and Rothstein (2004), on Hoxby "Does Competition Among Public Schools Benefit Students and Taxpayers," American Economic Review, 2000. In this paper, I discuss every claim of any importance in the comments. I show that every claim is wrong. I...

The incomes and wages of college-educated Americans have become significantly more dispersed since 1970. This paper attempts to decompose this growing dispersion into three possible sources of growth. The first source, or extensive margin,' is the increasing demographic diversity of people who...

This paper evaluates the first year of Harvard's Financial Aid Initiative, which increased aid and recruiting for students from low income backgrounds. Using rich data from the Census and administrative sources, we estimate family incomes for the vast major of plausible applicants from the U.S....

New empirical work shows the degree of competition among public providers of local public goods or between public and private providers of local public goods matters. This evidence needs a theory of the local public goods producer. Tiebout's hypothesis spawned a literature that gives local...

A school that is more productive is one that produces higher achievement in its pupils for each dollar it spends. In this paper, I comprehensively review how school choice might affect productivity. I begin by describing the importance of school productivity, then explain the economic logic that...

The Department of Justice's (DOJ's) investigation of private colleges for price-fixing caused the Overlap' group of colleges to discontinue their meetings. DOJ alleged that the meetings enabled the colleges to collude on higher tuition and increase their tuition revenue. The colleges claimed...

We show how to construct a ranking of U.S. undergraduate programs based on students' revealed preferences. We construct examples of national and regional rankings, using hand-collected data on 3,240 high- achieving students. Our statistical model extends models used for ranking players in...