Artikel

Critical discount factor values in discounted supergames

This paper examines the subgame-perfect equilibria in symmetric 2×2 supergames. We solve the smallest discount factor value for which the players obtain all the feasible and individually rational payoffs as equilibrium payoffs. We show that the critical discount factor values are not that high in many games and they generally depend on how large the payoff set is compared to the set of feasible payoffs. We analyze how the stage-game payoffs affect the required level of patience and organize the games into groups based on similar behavior. We study how the different strategies affect the set of equilibria by comparing pure, mixed and correlated strategies. This helps us understand better how discounting affects the set of equilibria and we can identify the games where extreme patience is required and the type of payoffs that are difficult to obtain. We also observe discontinuities in the critical values, which means that small changes in the stage-game payoffs may affect dramatically the equilibrium payoffs.

Sprache
Englisch

Erschienen in
Journal: Games ; ISSN: 2073-4336 ; Volume: 9 ; Year: 2018 ; Issue: 3 ; Pages: 1-17 ; Basel: MDPI

Klassifikation
Wirtschaft
Stochastic and Dynamic Games; Evolutionary Games; Repeated Games
Thema
repeated game
folk theorem
discount factor
2x2 games
payoff set
correlated equilibrium

Ereignis
Geistige Schöpfung
(wer)
Berg, Kimmo
Kärki, Markus
Ereignis
Veröffentlichung
(wer)
MDPI
(wo)
Basel
(wann)
2018

DOI
doi:10.3390/g9030047
Handle
Letzte Aktualisierung
20.09.2024, 08:24 MESZ

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Objekttyp

  • Artikel

Beteiligte

  • Berg, Kimmo
  • Kärki, Markus
  • MDPI

Entstanden

  • 2018

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