This paper considers the relative efficiency of ad valorem and unit taxes in imperfectly competitive markets. We provide a simple proof that ad valorem taxes are welfare-superior to unit taxes in the short run when production costs are identical across firms. The proof covers differentiated products and a wide range of market conduct. Cost asymmetries strengthen the case for ad valorem taxation under Cournot competition, but unit taxation may be welfare-superior under Bertrand competition with product differentiation. Ad valorem taxation is superior with free entry under Cournot competition, but not necessarily under price competition when consumers value variety.
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Paper provided by Iowa State University, Department of Economics in its series Staff General Research Papers with number
5203.
Length: Date of creation: 01 Mar 2002 Date of revision: Publication status: Published in Journal of Public Economics, August 2001, pp. 231-251. Handle: RePEc:isu:genres:5203
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Kind, Hans Jarle & Koethenbuerger, Marko & Schjelderup, Guttorm, 2007.
"Taxation in Two-Sided Markets,"
Discussion Papers
2007/3, Department of Finance and Management Science, Norwegian School of Economics and Business Administration.
[Downloadable!]
Martin Peitz & Markus Reisinger, 2009.
"Indirect Taxation in Vertical Oligopoly,"
Discussion Papers
255, SFB/TR 15 Governance and the Efficiency of Economic Systems, Free University of Berlin, Humboldt University of Berlin, University of Bonn, University of Mannheim, University of Munich.
[Downloadable!]