Oblivious Equilibrium for Concentrated Industries

C. Lanier Benkard, Przemyslaw Jeziorski and Gabriel Y. Weintraub

No 19307, NBER Working Papers from National Bureau of Economic Research, Inc

Abstract: This paper explores the application of oblivious equilibrium to concentrated industries. We define an extended notion of oblivious equilibrium that we call partially oblivious equilibrium (POE) that allows for there to be a set of "dominant firms'', whose firm states are always monitored by every other firm in the market. We perform computational experiments that show that POE are often close to MPE in concentrated industries with characteristics similar to real world industries even when OE are not. We derive error bounds for evaluating the performance of POE when MPE cannot be computed. Finally, we demonstrate an important trade-off facing empirical researchers between implementing an equilibrium concept that is computationally light in a richer economic model, and implementing MPE in a simpler one.

JEL-codes: L0 L1 L13 (search for similar items in EconPapers)
Date: 2013-08
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Published as Oblivious equilibrium for concentrated industries C. Lanier Benkard1, Przemyslaw Jeziorski2 andGabriel Y. Weintraub3 The RAND Journal of Economics Volume 46, Issue 4, pages 671–708, Winter 2015

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