Overconfidence in the Markets for Lemons

Herweg, Fabian und Müller, Daniel (17. December 2013): Overconfidence in the Markets for Lemons. SFB/TR 15 Discussion Paper No. 452

Abstract

We extend Akerlof (1970)’s “Market for Lemons” by assuming that some buyers are overconfident. Buyers in our model receive a noisy signal about the quality of the good that is on display for sale. Overconfident buyers do not update according to Bayes’ rule but take the noisy signal at face value. We show that the presence of overconfident buyers can stabilize the market outcome by preventing total adverse selection. This stabilization, however, comes at a cost: rational buyers are crowded out of the market.

• Item Type: Paper
• Keywords: Adverse Selection; Market for Lemons; Overconfidence
• Faculties: Special Research Fields > Discussion Paper Series of SFB/TR 15 Governance and the Efficiency of Economic Systems; Special Research Fields > Discussion Paper Series of SFB/TR 15 Governance and the Efficiency of Economic Systems > A4 - Unvollständige Verträge, Marktinteraktion und soziale Vergleichsprozesse
• Subjects: 300 Social sciences > 330 Economics
• JEL Classification: D82, L15
• Language: English