This paper develops a tractable dynamic model of competition between two risk-averse portfolio managers who attempt to outperform each other by trading in different stocks, reflecting asset specialization. We characterize explicitly the unique Nash equilibrium portfolio policies, and show that a...

Building on a framework of heterogeneous uncertainty across the population, this paper provides a unified theoretical explanation for several salient features of household investment behavior: First, a fraction of households will choose not to participate in the stock market, with poorer...

We develop a dynamic model of belief dispersion with a continuum of investors differing in beliefs. The model is tractable and qualitatively matches many of the empirical regularities in a stock price, its mean return, volatility, and trading volume. We find that the stock price is convex in...