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A Variance Screen for Collusion

Rosa M. Abrantes-Metz
LECG, LLC; Leonard N. Stern School of Business - Department of Economics

Christopher T. Taylor
U.S. Federal Trade Commission - Bureau of Economics

Luke Froeb
Vanderbilt University - Owen Graduate School of Management

John Geweke
University of Iowa - Henry B. Tippie College of Business - Department of Economics


March 2005

Vanderbilt Law and Economics Research Paper No. 05-13; FTC Bureau of Economics Working Paper No. 275

Abstract:     
In this paper, we examine price movements over time around the collapse of a bid-rigging conspiracy. While the mean decreased by sixteen percent, the standard deviation increased by over two hundred percent. We hypothesize that conspiracies in other industries would exhibit similar characteristics and search for "pockets" of low price variation as indicators of collusion in the retail gasoline industry in Louisville. We observe no such areas around Louisville in 1996-2002.

Keywords: Collusion, Price Fixing, Firms, Firm

JEL Classifications: L12, L41, D40

Working Paper Series

Date posted: April 07, 2005 ; Last revised: April 18, 2005

Suggested Citation

Abrantes-Metz, Rosa M., Taylor, Christopher T., Froeb, Luke M. and Geweke, John F., A Variance Screen for Collusion (March 2005). Vanderbilt Law and Economics Research Paper No. 05-13; FTC Bureau of Economics Working Paper No. 275. Available at SSRN: http://ssrn.com/abstract=683922 or doi:10.2139/ssrn.683922


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Contact Information

Rosa M. Abrantes-Metz (Contact Author)
LECG, LLC ( email )
675 Third Avenue
26th floor
New York, NY 10017
United States
(212) 506-3981 (Phone)
Leonard N. Stern School of Business - Department of Economics ( email )
269 Mercer Street
New York, NY 10003
United States
Luke M. Froeb
Vanderbilt University - Owen Graduate School of Management ( email )
401 21st Avenue South
Nashville, TN 37203
United States
615-322-9057 (Phone)
615-343-7177 (Fax)
John F. Geweke
University of Iowa - Henry B. Tippie College of Business - Department of Economics ( email )
108 Pappajohn Building
Iowa City, IA 52242
United States
319-335-0857 (Phone)
Christopher T. Taylor
U.S. Federal Trade Commission - Bureau of Economics ( email )
601 Pennsylvania Avenue, NW
Antitrust Division
Washington, DC 20580
United States
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References: 16
Citations: 12

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