This expository paper describes the factors that contribute to failure of health insurance markets, and the regulatory mechanisms that have been and can be used to combat these failures. Standardized contracts and creditable coverage mandates are discussed, along with premium support, enrollment mandates, guaranteed issue, and risk adjustment, as remedies for selection-related market damage. An
This paper characterizes the price adjustment costs that are consistent with observed price dynamics in the European car market. Using the methodology developed by Bajari, Benkard, and Levin (2007), I estimate a dynamic model of international multiproduct firms that set prices in different currencies while facing price adjustment costs. There are three main results. First,