Information acquisition, price informativeness, and welfare

Abstract

We consider the market for a risky asset with heterogeneous valuations. Private information that agents have about their own valuation is reflected in the equilibrium price. We study the learning externalities that arise in this setting, and in particular their implications for price informativeness and welfare. When private signals are noisy, so that agents rely more on the information conveyed by prices, discouraging information gathering may be Pareto improving. Complementarities in information acquisition can lead to multiple equilibria.

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