This research examines the cost structure of a nationally representative sample of HMOs from 1991-1994 to determine whether cost savings achieved through enrollment growth and age of the plan are shared with any of the factors of production. The data are obtained from Health Care Investment...

Many states enacted tort liability reform laws in the late 1980s to limit liability costs and stabilize insurance markets. This paper uses firm-level data from two states that enacted reforms over the 1984-91 period--New York and Colorado--to assess their effects. The liability insurance...

Natural catastrophes often have catastrophic risks on insurance companies as well as on the insured. Using a very large dataset on homeowners%u2019 insurance coverage by state, by firm, and by year for the 1984 to 2004 period, this paper documents the positive effect on losses and loss ratios of...