The literature traditionally assumes that a portfolio manager who expends costly effort to generate information makes an unrestricted portfolio choice and is paid according to a sharing rule. However, the revelation principle provides a more efficient institution.(...)

This article develops a model which shows that bank deposit contracts can provide allocations superior to those of exchange markets, offering an explanation of how banks subject to runs can attract deposits. Investors face privately observed risks which lead to a demand for liquidity....

A number of portfolio strategies followed by practitioners are dominated because they are incompletely diversified over time. The Payoff Distribution Pricing Model is used to compute the cost of following undiversified strategies. Simple numerical examples illustrate the technique, and...

At one time, risk management was limited to insurance and the avoidance of lawsuits and accidents. The new risk management also includes using tools developed for pricing financial options for the management of financial risks within the firm. Trading in financial markets based on these tools...

A restriction to nonnegative wealth is sufficient to preclude all arbitrage opportunities in financial models that have risk neutral probabilities that are valid for all simple strategies. Imposing nonnegative wealth does not constrain agents from making the choice they would make under the...

The Modigliani and Miller propositions on the irrelevancy of capital structure and dividends are shown to be valid in a large class of models with asymmetric information. The main assumption is that managerial compensation is chosen optimally. This differs from most recent papers on this topic,...

This note examines the effect of changes in risk aversion on the optimal portfolio choice in a complete market. It is shown that an agent who is less risk averse in the Pratt (1964) sense than another will choose a portfolio whose payoff is distributed as the other's payoff plus a nonnegative...