We study when equilibrium prices can aggregate information in an auction market with a large population of traders. Our main result identifies a property of information—the betweenness property that is both necessary and sufficient for information aggregation. The characterization provides...

Siga and Mihm (2020) characterize the information environments where prices can aggregate information in a competitive auction market with an atomless population of traders. In this paper, we provide an explicit model of the large population where implications of the law of large numbers for...

Asymmetric information plays an important role in markets and politics. When parties are asymmetrically informed and have misaligned preferences, they may be hurt by adverse selection. By contrast, if parties know that their preferences are aligned, they may benefit from advantageous selection....

We study when equilibrium prices can aggregate information in an auction market with a large population of traders. Our main result identifies a property of information---the betweenness property---that is both necessary and sufficient for information aggregation. The characterization provides...