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Core-stable rings in second price auctions with common values

  • Orzach, Ram
  • Forges, Françoise

In a commonvalueauction in which the information partitions of the bidders are connected, all rings are core-stable. More precisely, the ex ante expected utilities of rings, at the (noncooperative) sophisticated equilibrium proposed by Einy et al. [Einy, E., Haimanko, O., Orzach, R., Sela, A., 2002. Dominance solvability of second-pricesauctions with differential information. Journal of Mathematical Economics 37, 247–258], describe a cooperative games in characteristic function form, in spite of the underlying strategic externalities. A ring is core-stable if the core of this characteristic function is not empty. Furthermore, every ring can implement its sophisticated equilibrium strategy by means of an incentive compatible mechanism. An example shows that, if the bidders’ information partitions are not connected, rings may no longer be core-stable.

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Paper provided by Paris Dauphine University in its series Economics Papers from University Paris Dauphine with number 123456789/7891.

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Date of creation: 2011
Date of revision:
Publication status: Published in Journal of Mathematical Economics, 2011, Vol. 47, no. 6. pp. 760-767.Length: 7 pages
Handle: RePEc:dau:papers:123456789/7891
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