2022 Fiscal Year Final Research Report
A choice function approach to variable population social choice and population ethics
Project/Area Number |
20K01565
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Review Section |
Basic Section 07010:Economic theory-related
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Research Institution | Sophia University |
Principal Investigator |
KAMAGA Kohei 上智大学, 経済学部, 教授 (00453978)
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Project Period (FY) |
2020-04-01 – 2023-03-31
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Keywords | 社会的選択理論 / 人口倫理 / 公理的分析 / 厚生主義 / 選択関数 / 功利主義 / 充分主義 / 世代間衡平性 |
Outline of Final Research Achievements |
It is shown that when the population size of future people will vary across alternatives, if the identities future people alive are unobservable, social evaluation and/or social choice must be done by only using the utility information as an informational basis, and in addition, social evaluation and/or social choice must satisfy Strong Anonymity, which is the logically strongest requirement among the impartiality axioms. Further, the sensitivity property that is compatible with Strong Anonymity and some auxiliary axioms must be defined for utility values equal to or below the limit inferior of a utility stream. Utilitarian criteria that are compatible with those axioms are presented and axiomatically characterized. It is also shown that those criteria can derive the optimal path in a simple Ramsey model.
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Free Research Field |
経済学
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Academic Significance and Societal Importance of the Research Achievements |
人口が可変である場合の社会的選択の文脈に,将来生まれる人々の人格の観察不可能性という観点を入れた分析を新たに行うことで,そうした場合の社会的評価および社会的選択が非常に強い不偏性を満たす形で行われなければいけないことを明らかにした.とりわけ,その含意として,将来世代の効用を評価する際には,効用列の下極限以下にのみ焦点を当てなけれならないことをいくつかの公理から理論的に明らかにしており,相対的に不遇な状態に置かれている将来世代に注目した世代間利害調整を行うことに理論的な基礎づけを与えている.
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