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Antonio Guarino

21 March 2007
WORKING PAPER SERIES - No. 736
Details
Abstract
We study the effect of transaction costs (e.g., a trading fee or a transaction tax, like the Tobin tax)on the aggregation of private information in financial markets. We analyze a financial market à la Glosten and Milgrom, in which informed and uninformed traders trade in sequence with a market maker. Traders have to pay a cost in order to trade. We show that, eventually, all informed traders decide not to trade, independently of their private information, i.e., an informational cascade occurs. We replicated our financial market in the laboratory. We found that, in the experiment, informational cascades occur when the theory suggests they should. Nevertheless, the ability of the price to aggregate private information is not significantly affected.
JEL Code
C92 : Mathematical and Quantitative Methods→Design of Experiments→Laboratory, Group Behavior
D8 : Microeconomics→Information, Knowledge, and Uncertainty
G14 : Financial Economics→General Financial Markets→Information and Market Efficiency, Event Studies, Insider Trading