Kerim Keskin

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In this paper, we propose lattice-theoretical methods to analyze the existence and the order structure of Berge equilibria (in the sense of Zhukovskii) in noncooperative games [Berge, 1957; Zhukovskii, 1994]. At a Berge equilibrium, each agent’s payoff is maximized by the complementary coalition formed by all the other players. Given that a player chooses(More)
AIM Data evaluating the complications of pulmonary vein isolation (PVI) using second-generation cryoballoons (CB) related to different anticoagulation regimes are limited. This study evaluates the total complications and the impact of novel oral anticoagulants (NOACs) compared to phenprocoumon on adverse events in the setting of PVI using CB. METHODS AND(More)
This paper studies the existence and the order structure of strong Berge equilibrium, a refinement of Nash equilibrium, for games with strategic complementarities à la strong Berge. It is shown that the equilibrium set is a nonempty complete lattice. Moreover, we provide a monotone comparative statics result such that the greatest and the lowest equilibria(More)
We introduce a minimal notion of altruism and use it to refine Nash equilibria in normal form games. We provide three independent existence proofs, relate minimally altruistic Nash equilibrium to other equilibrium concepts, conduct an in-depth sensitivity analysis, and provide examples where minimally altruistic Nash equilibrium leads to improved(More)
We set up a rich bilateral bargaining model with four salient points (disagreement point, ideal point, reference point, and tempered aspirations point), where the disagreement point and the utility possibilities frontier are endogenously determined. This model allows us to compare two bargaining solutions that use reference points, the Gupta-Livne solution(More)
BACKGROUND Second-generation cryoballoon (CB-2) is associated with improved outcomes for pulmonary vein isolation (PVI) compared to first generation (CB-1). However, data regarding the predictors of pulmonary vein (PV) electrical reconnection are limited. In this study, we aimed to characterize the predilection sites and predictors of reconnection in(More)
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