Learning and Equilibrium Selection in a Monetary Overlapping Generations Model with Sticky Prices

We study adaptive learning in a monetary overlapping generations model with sticky prices and monopolistic competition for the case where learning agents observe current endogenous variables. Observability of current variables is essential for informational consistency of the learning setup with the model setup but generates multiple temporary equilibria when prices are flexible and prevents a straightforward construction of the learning dynamics. Sticky prices overcome this problem by avoiding simultaneity between prices and price expectations. Adaptive learning then robustly selects the determinate (monetary) steady state independent from the degree of imperfect competition. The indeterminate (non-monetary) steady state and non-stationary equilibria are never stable. Stability in a deterministic version of the model may differ because perfect foresight equilibria can be the limit of restricted perceptions equilibria of the stochastic economy with vanishing noise and thereby inherit different stability properties. This discontinuity at the zero variance of shocks suggests one should analyse learning in stochastic models.     

Do Firms Use Derivatives to Reduce their Dependence on External Capital Markets?

This study investigates if the use of derivatives by corporations is likelyto affect their financing strategies. I find a strong positive relationbetween the minimum revenue guaranteed by hedging and investmentexpenditures. This result implies that hedging increases the likelihood thatinvestments can be financed internally. I also find that firms tend tofinance their investment expenditures externally rather than internally. Ifexternal capital is more costly than internal capital it would clearly be ina firm's interest to reduce its dependence on external capital. Consistentwith this result, I find that the median firm that does not hedge finances100% of its investment expenditures externally, while the median firm thathedges finances only 86% of investments externally.     

Market allocation of indivisible goods

The existence of equitable allocations of divisible goods is established. The methods used give divisions of a good into geometrically simple sets, such as simplexes or polyhedral convex cones. This economic problem is solved by applying David Gale's covering lemma. An extension of Gale's lemma and its dual versions are established; the proofs are based on Ky Fan's fundamental theorem on coincidence of two set-valued functions.     

Market and regulatory forces in the pricing of legal services

New data on individual law firms and attorneys is used to examine the effects of professional licensing restrictions and market forces on prices of legal services. The data allow detailed testing of the hypothesis that licensing restrictions serve to increase the price of professional services as well as the incomes of those providing these services. In general, little support is found for this hypothesis. Instead, the estimates show that market forces are most important in explaining variations in prices and attorney incomes.Dean Lueck is on leave from Louisiana State University. We thank William Boiger, Executive Director of the National Resource Center for Consumers of Legal Services, for providing data on law firms. Andrew Dick, Philip Hersch, Andy Kleit, Bill Kovacic, Fred McChesney, Jeff Moore, and two anonymous referees provided helpful comments on earlier versions. Chris Diener, Jim Larkins, Robert Pace, and Darrin Timothy provided research assistance.