Costly information acquisition makes it rational for investors to obtain important economic news with only limited frequency or limited accuracy. We show that this rational inattention to important news may make investors over- or underinvest. In addition, the optimal trading strategy is...

"Risk management" in securities markets refers to the oversight of portfolio managers and professional traders when they trade on behalf of investors in security markets. Monitoring of their trading performance, profit and loss, and risk-taking behavior, is measured by principals using security...

Trade in securities markets is conducted by agents acting for principals, using "mark-to-market" contracts whereby performance is assessed using security market prices. We endogenize contract choices, information production, informed trading, and security price informativeness. But there is a...

Mutual funds typically invest a disproportionately large portion of their portfolio in one industry (main industry). We present a simple theoretical model to demonstrate that better mutual fund managers make larger investments in the important supplier/customer industries related to the main...

We study an infinite-horizon Lucas tree model where a manager is hired to tend to the trees and is compensated with a fraction of the treesʼ output. The manager trades shares with investors and makes an effort that determines the distribution of the output. When the manager is less (more)...

parameters optimal; for other parameters, strictly positive rates (inflation above the Friedman Rule) are optimal.

Stock prices are more informative when the information has less social value. Speculators with limited resources making costly (private) information production decisions must decide to produce information about some firms and not others. We show that producing and trading on private information...

Why do governments bailout banking systems in distress? We argue that the government can efficiently provide liquidity. We present a general equilibrium model in which not all assets can be used to purchase all other assets at every date. At some dates agents want to sell projects or securities....