We examine why managed care plans are less expensive than traditional indemnity insurance plans. Our database consists of the insurance experiences of over 200,000 state and local employees in Massachusetts and their families, who are insured in a single pool. Within this group, average HMO...

Are market and voting institutions capable of producing optimal intergenerational risk-sharing? To study this question, we consider a simple endowment economy with uncertainty and overlapping generations. Endowments are stochastic; thus it is possible to increase the welfare of every generation...

This paper estimates the profits to insiders when they trade their company's stock. We construct a rolling purchase portfolio' that holds all shares purchased by insiders over the previous year and an analogous sale portfolio' that holds all shares sold by insiders over the previous year. We...

High-quality producers in a vertically differentiated market can reap superior profits by charging higher prices, selling greater quantities, or both. If qualities are known by consumers and production costs are constant, then having a higher quality secures the producer both higher price and...

The pecuniary effects of cash and in-kind programs differ. A program that builds housing for the poor, for example, is likely to result in a lower price of existing low-income housing than would an equally costly cash transfer program. Low-income renters in general would benefit; landlords would...

We investigate the transition from private to public ownership of companies that had previously been subject to leveraged buyouts. As they go to the public markets for equity, such firms face an information asymmetry problem. Behavioral effects are also likely to be at work. We show that the...

Australia pays less than other developed nations for her pharmaceuticals, about 45% as much as the United States. She achieves this result with an ingenious price-contingent subsidy scheme, which turns deadweight loss (due to pricing above marginal cost) into consumer surplus. Pharmaceutical...

The insights of descriptive decision theorists and psychologists, we believe, have much to contribute to our understanding of financial market macrophenomena. We propose an analytic agenda that distinguishes those individual idiosyncrasies that prove consequential at the macro-level from those...

The net returns of no-load mutual growth funds exhibit a hot-hands phenomenon during 1974-87. When performance is measured by Jensen's alpha, mutual funds that perform well in a one year evaluation period continue to generate superior performance in the following year. Underperformers also...

Donald Trump's election and his nomination of Scott Pruitt, a climate skeptic, to lead the Environmental Protection Agency drastically downshifted expectations on US climate-change policy. We study firms' stock-price reactions and institutional investors' portfolio adjustments after these...