A firm has investment options that it may use up immediately, or store for future use. A patent, e.g., is an option to implement an idea via a product or process innovation. Other investment options are protected by secrecy. An investment option is a profit opportunity that requires an...

In this paper we investigate the sources of the important shifts in the volatility of U.S. macroeconomic variables in the postwar period. To this end, we propose the estimation of DSGE models allowing for time variation in the volatility of the structural innovations. We apply our estimation...

I propose a new valuation ratio: durables price over the rental cost of capital, which is a direct analogue of the price-dividend ratio. I show that it is a rational forecast of future discount rates and future growth rates of the rental cost. In order to impute the unobservable rental cost, I...

We are interested in the macroeconomic implications of the separation of ownership and control. We propose an alternative decentralized interpretation of the stochastic growth model, one where shareholders hire a self-interested manager who is in charge of the firm’s hiring and investment...

This paper develops a new framework that combines agency problems associated with managerial behavior and firm finance in a dynamic macroeconomic model. Agency costs arise because neither the shareholders nor the debt provider can directly control the manager's choice of how much risk to assume,...