This paper provides a microfounded information acquisition technology based on a simple framework with information search. When searchable information is limited, an agent encounters increasingly more redundant information in his search for new information. Redundancy slows down the learning...

We study a dynamic equilibrium model of mutual fund investing under career concerns that features investment opportunities at different horizons. Equilibrium returns are endogenously determined by competition. Short-term investment strategies can benefit fund managers by accelerating skill...

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...