A Variance Screen for Collusion

Elsevier Science Bv
Publication Type:
Journal Article
International Journal Of Industrial Organisation, 2006, 24 (3), pp. 467 - 486
Issue Date:
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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 deviations 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.
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