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Allocative and Informational Externalities in Auctions and Related Mechanisms

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  • Philippe Jehiel
  • Benny Moldovanu

Abstract

We study the effects of allocative and informational externalities in (multi-object) auctions and related mechanisms. Such externalities naturally arise in models that embed auctions in larger economic contexts. In particular, they appear when there is downstream interaction among bidders after the auction has closed. The endogeneity of valuations is the main driving force behind many new, specific phenomena with allocative externalities: even in complete information settings, traditional auction formats need not be efficient, and they may give rise to multiple equilibria and strategic non-participation. But, in the absence of informational externalities, welfare maximization can be achieved by Vickrey-Clarke- Groves mechanisms. Welfare-maximizing Bayes-Nash implementation is, however, impossible in multi-object settings with informational externalities, unless the allocation problem is separable across objects (e.g. there are no allocative externalities nor complementarities) or signals are one-dimensional. Moreover, implementation of any choice function via ex-post equilibrium is generically impossible with informational externalities and multidimensional types. A theory of information constraints with multidimensional signals is rather complex, but indispensable for our study.

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Paper provided by UCLA Department of Economics in its series Levine's Bibliography with number 784828000000000490.

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Date of creation: 04 Nov 2005
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Handle: RePEc:cla:levrem:784828000000000490

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Cited by:
  1. Börgers, Tilman & Cox, Ingemar & Pesendorfer, Martin & Petricek, Vaclav, 2008. "Equilibrium Bids in Sponsored Search Auctions: Theory and Evidence," MPRA Paper 29125, University Library of Munich, Germany.
  2. Maarten Janssen & Vladimir A. Karamychev & Emiel Maasland, 2009. "Auctions with Flexible Entry Fees," Tinbergen Institute Discussion Papers 09-109/1, Tinbergen Institute.
  3. Janssen, Maarten C.W. & Karamychev, Vladimir A. & Maasland, Emiel, 2011. "Auctions with flexible entry fees: A note," Games and Economic Behavior, Elsevier, vol. 72(2), pages 594-601, June.
  4. Janssen, Maarten C.W. & Karamychev, Vladimir A., 2009. "Auctions, aftermarket competition, and risk attitudes," International Journal of Industrial Organization, Elsevier, vol. 27(2), pages 274-285, March.
  5. Lamy, Laurent, 2012. "On minimal ascending auctions with payment discounts," Games and Economic Behavior, Elsevier, vol. 75(2), pages 990-999.
  6. Laurent Lamy, 2009. "Ascending auctions: some impossibility results and their resolutions with final price discounts," PSE Working Papers halshs-00575076, HAL.
  7. Gärtner, Dennis & Schmutzler, Armin, 2006. "Merger Negotiations and Ex-Post Regret," CEPR Discussion Papers 5911, C.E.P.R. Discussion Papers.
  8. Axel Ockenfels, 2008. "Marktdesign und Experimentelle Wirtschaftsforschung," Working Paper Series in Economics 41, University of Cologne, Department of Economics.
  9. Carbajal, Juan Carlos & McLennan, Andrew & Tourky, Rabee, 2013. "Truthful implementation and preference aggregation in restricted domains," Journal of Economic Theory, Elsevier, vol. 148(3), pages 1074-1101.
  10. Levy, Gilat & Razin, Ronny, 2013. "Dynamic legislative decision making when interest groups control the agenda," Journal of Economic Theory, Elsevier, vol. 148(5), pages 1862-1890.
  11. Maarten C.W. Janssen & Vladimir A. Karamychev, 2007. "Do Auctions select Efficient Firms?," Tinbergen Institute Discussion Papers 07-001/1, Tinbergen Institute.
  12. Schmitz, Patrick W., 2010. "Contractual solutions to hold-up problems with quality uncertainty and unobservable investments," Journal of Mathematical Economics, Elsevier, vol. 46(5), pages 807-816, September.
  13. Csapó, Gergely & Müller, Rudolf, 2013. "Optimal mechanism design for the private supply of a public good," Games and Economic Behavior, Elsevier, vol. 80(C), pages 229-242.
  14. Schmitz, Patrick W., 2010. "On contractual solutions to hold-up problems with quality uncertainty and unobservable investments," MPRA Paper 23157, University Library of Munich, Germany.

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