Dynamic Adverse Selection and the Size of the Informed Side of the Market
In this paper we examine the problem of dynamic adverse selection in a stylized market where the quality of goods is a seller’s private information. We show that in equilibrium all goods can be traded if a simple piece of information is made publicly available: the size of the informed side of the market. Moreover, we show that if exchanges can take place frequently enough, then agents roughly enjoy the entire potential surplus from exchanges. We illustrate these findings with a dynamic model of trade where buyers and sellers repeatedly interact over time. More precisely we prove that, if the size of the informed side of the market is a public information at each trading stage, then there exists a weak perfect Bayesian equilibrium where all goods are sold in finite time and where the price and quality of traded goods are increasing over time. Moreover, we show that as the time between exchanges becomes arbitrarily small, full trade still obtains in finite time – i.e., all goods are actually traded in equilibrium – while total surplus from exchanges converges to the entire potential. These results suggest two policy interventions in markets suffering from dynamic adverse selection: first, the public disclosure of the size of the informed side of the market in each trading stage and, second, the increase of the frequency of trading stages.
|Date of creation:||Mar 2011|
|Date of revision:|
|Contact details of provider:|| Web page: http://www.recent.unimore.it/|
More information through EDIRC
Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
- Marina Murat & Barbara Pistoresi, 2006.
"Emigrants and immigrants networks in FDI,"
Department of Economics
0546, University of Modena and Reggio E., Faculty of Economics "Marco Biagi".
- Giuseppe Marotta, 1997. "Does trade credit redistribution thwart monetary policy? Evidence from Italy," Applied Economics, Taylor & Francis Journals, vol. 29(12), pages 1619-1629.
- Michele Bruni & Claudio Tabacchi, 2011.
"Present and Future of the Chinese labour Marke,"
Department of Economics
0649, University of Modena and Reggio E., Faculty of Economics "Marco Biagi".
When requesting a correction, please mention this item's handle: RePEc:mod:recent:057. See general information about how to correct material in RePEc.
For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: ()
If references are entirely missing, you can add them using this form.