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Does Rigidity of Prices Hide Collusion?

Author

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  • Juan Luis Jiménez

    (Facultad de Economía, Empresa y Turismo, University of Las Palmas de Gran Canaria)

  • Jordi Perdiguero

    (Faculty of Economics, University of Barcelona)

Abstract

Cartel detection is one of the most basic and most complicated tasks of competition authorities. In recent years, however, variance filters have provided a fairly simple tool for rejecting the existence of price-fixing, with the added advantage that the methodology requires only a low volume of data. In this paper we analyze two aspects of variance filters: (i) the relationship established between market structure and price rigidity, and (ii) the use of different benchmarks for implementing the filters. This paper addresses these two issues by applying a variance filter to a gasoline retail market characterized by a set of unique features. Our results confirm the positive relationship between monopolies and price rigidity, and the variance filter's ability to detect non-competitive behavior when an appropriate benchmark is used. Our findings should serve to promote the implementation of this methodology among competition authorities, albeit in the awareness that a more exhaustive complementary analysis is required.

Suggested Citation

  • Juan Luis Jiménez & Jordi Perdiguero, 2011. "Does Rigidity of Prices Hide Collusion?," IREA Working Papers 201120, University of Barcelona, Research Institute of Applied Economics, revised Oct 2011.
    • Handle: RePEc:ira:wpaper:201120
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