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This paper examines the effect of competition on second degree price discrimination in display advertising in Yellow Page directories. Our main empirical finding is that while competition is associated with lower prices, the association is not proportional along the range of product offerings. Instead, directories that face more competitors offer price(More)
an anonymous referee, and seminar participants at several institutions for helpful comments. I would like to thank the Social Sciences and Humanities Research Council of Canada and the Alfred P. Sloan Foundation for financial support during the preparation of this paper. This paper is a revised version of parts of my doctoral dissertation.
We analyze consumer choice and pricing regulation on the Masaschusetts health insurance exchange. Coarse insurer pricing strategies identify price sensitivity, showing substantial age-based heterogeneity: the young are more than twice as price sensitive as the old. Di¤erences in prices by age re ‡ect price discrimination motives as well as cost motives.(More)
Acknowledgments: We are grateful to Tom Cragg and Bruce Bradley for providing the data for this study. We acknowledge helpful comments from anonymous referees, and seminar participants at numerous institutions. We also appreciate editorial assistance from Anita Todd and programming assistance from Joe Vasey. An earlier version of this paper was distributed(More)
We provide a description of the internal functioning of a price-posting retail market cartel based on an analysis of court documents containing the recorded conversations of participants in actual gasoline cartels operating in Québec. We characterize the organization and the pricing mechanism of the cartels, and we relate our findings to the theoretical(More)
We study the degree to which greater physician concentration leads to higher service prices charged by physicians in the commercially insured medical-care market. Using a database of physicians throughout the entire United States, we construct physician-firm concentration measures based on market boundaries defined by fixed driving times—we label the "(More)
The AAordable Care Act (ACA) requires that all U.S. states establish regulated individual insurance markets, known as health insurance exchanges (HIX), to facilitate the purchase of health insurance. In this paper, I evaluate the current HIX system and examine its optimal design, accounting for adverse selection and equilibrium labor market interactions. I(More)
There is enormous variation in medical treatment across physicians, hospitals and regions but designing reforms to lower costs and maintain quality requires identifying specific instances of inefficient spending. We develop a measure of the efficiency of health care delivery based on the frequency of negative CT scans for pulmonary embolism. Our model shows(More)
This paper seeks to evaluate whether the adoption of electronic medical records (EMRs) leads to upcoding for hospitalized Medicare patients, defined as categorizing a condition as more serious than justified in order to inflate bills, or more accurate coding. We use a triple difference: (1) between EMR and non-EMR hospitals; (2) before and after the 2007(More)
The AAordable Care Act (ACA) requires that all U.S. states establish regulated individual insurance markets, known as health insurance exchanges (HIX), to facilitate the purchase of health insurance. In this paper, I evaluate the current HIX system and examine its optimal design, accounting for adverse selection and equilibrium labor market interactions. I(More)