Who should control the firm? What should be the firm's objective function? If contracts are incomplete, then the group of input providers that most needs their interests protected should be allocated control rights to the firm. Existing theories argue that the suppliers of capital are most in...

We determine firms' equity ownership structures and provide a theory of hostile takeovers by distinguishing the roles of two types of blockholders: rich investors and institutional investors. We also distinguish the roles of two types of stock markets: the block market and the market with small...

Firms are more complicated than standard principal-agent theory allows: firms have assets-in-place; firms endure through time, allowing for the possibility of replacing a shirking manager; firms have many managers, constraining the amount of equity that can be awarded to any one manager; and, a...

Universal banking is an alternative mechanism to a stock market for risk-sharing, for providing information for guiding investment, and for contesting corporate governance. In Germany, where the stock market has historically been small, banks hold equity stakes in firms and have proxy voting...

We study whether the socially optimal level of stability of the banking system can be implemented with regulatory capital requirements in a multi-period general equilibrium model of banking. We show that: (i) bank capital is costly because of the unique liquidity services provided by demand...

In a capitalist economy prices serve to equilibrate supply and demand for goods and services, continually changing to reallocate resources to their most efficient uses. However, secondary stock market prices, often viewed as the most 'informationally efficient' prices in the economy, have no...

In the last ten to fifteen years financial derivative securities have become an important, and controversial, product for commercial banks. The controversy concerns whether the size, complexity, and risks associated with these securities, the difficulties with accurately reporting timely...

We consider a model of the stock market with delegated portfolio management. All agents are rational: some trade for hedging reasons, some investors optimally contract with portfolio managers who may have stock-picking abilities, and portfolio managers trade optimally given the incentives...

This paper presents a simple general equilibrium model of asset pricing in which profitable informed trading can occur without any "noise" added to the model. It shows that models of profitable informed trading must restrict the portfolio choices of uninformed traders: in particular, they cannot...

In efficient markets the price should reflect the arrival of private information. The mechanism by which this is accomplished is arbitrage. A privately informed trader will engage in costly arbitrage, that is, trade on his knowledge that the price of an asset is different from the fundamental...