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Öğe Choosing a Committee Under Majority Voting(Springer-Verlag Berlin, 2019) Aslan, Fatma; Dindar, Hayrullah; Laine, JeanWe consider the elections of a seat-posted committee, and investigate the propensity of seat-wise majority voting to choose a committee that fulfills the majority will with respect to preferences over committees. Voters have seat-wise preferences and preferences over committees are derived from seat-wise preferences by means of a neutral preference extension. Neutrality means that the names of candidates do not play any role. The majority committee paradox refers to a situation where a Condorcet winner exists for each seat, and a Condorcet winner committee also exists but does not coincide with the combination of seat-wise Condorcet winners. The majority committee weak paradox refers to a situation where the combination of seat-wise Condorcet winners is not a Condorcet winner among committees. We characterize the domains of preference extensions immune to each of the paradoxes.Öğe Competitive equilibria in Shapley-Scarf markets with couples(Elsevier Science Sa, 2020) Aslan, Fatma; Laine, JeanWe investigate the existence and properties of competitive equilibrium in Shapley-Scarf markets involving an exogenous partition of individuals into couples. The presence of couples generates preference interdependencies which cause existence problems. For both cases of transferable and nontransferable income among partners, we establish properties for preferences that are sufficient for the existence of an equilibrium. Moreover, we show that these properties define a maximal preference domain. (C) 2020 Elsevier B.V. All rights reserved.Öğe Correction to: When are committees of Condorcet winners Condorcet winning committees? (Review of Economic Design, (2022), 26, 3, (417-446), 10.1007/s10058-021-00260-9)(Springer Science and Business Media Deutschland GmbH, 2023-06) Aslan, FatmaIn this article the affiliation details for Author Jean Lainé were incorrectly given as ‘Lirsa, National des Arts et Métiers, Paris, France’ but should have been “Lirsa, Conservatoire National des Arts et Métiers, Paris, France” In this article, the equation ß should be changed to p The original article has been corrected. © Springer-Verlag GmbH Germany, part of Springer Nature 2021.Öğe Minimal maskin monotonic extension of q-approval fallback bargaining within some family of social choice rules(İstanbul Bilgi Üniversitesi, 2009) Aslan, Fatma; Sanver, RemziBir sosyal seçim kuralının bazı sosyal seçim kuralları ailesi içindeki en küçük Maskin monoton genişlemesi kavramını tanıtarak, herhangi bir sosyal seçim kurallarının sadece bir tane en küçük Maskin monoton genişlemesini içeren sosyal seçim kuralları ailesini tanımlıyoruz. Böylece q-onay dönüş pazarlığının (Brams and Kilgour, 2001) ve bizim tanımladığımız q-onay kuralının, bazı sosyal seçim kuralları ailesindeki en küçük Maskin monoton genişlemesini karakterize ediyoruz.Öğe When are committees of Condorcet winners Condorcet winning committees?(Springer Heidelberg, 2022) Aslan, Fatma; Dindar, Hayrullah; Laine, JeanWe consider seat-posted (or designated-seat) committee elections, where disjoint sets of candidates compete for each seat. We assume that each voter has a collection of seat-wise strict rankings of candidates, which are extended to a strict ranking of committees by means of a preference extension. We investigate conditions upon preference extensions for which seat-wise Condorcet candidates, whenever all exist, form the Condorcet winner among committees. We characterize the domain of neutral preference extensions for which the committee of seat-wise winners is the Condorcet winning committee, first assuming the latter exists (Theorem 1) and then relaxing this assumption (Theorem 2). Neutrality means that preference extensions are not sensitive to the names of candidates. Moreover, we show that these two characterizations can be stated regardless of which preference level is considered as a premise.Öğe When are committees of Condorcet winners Condorcet winning committees? (Sept, 10.1007/s10058-021- 00260-9, 2021)(Springer Heidelberg, 2023) Aslan, Fatma; Dindar, Hayrullah; Laine, Jean[Abstract Not Available]
