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  1. 240 リスク研究センター(Center for Risk Research)
  2. 242 CRR Discussion Paper
  3. Series A : General( formerly : International Risk Study )

Daniel Ellsberg on J.M. Keynes and F.H. Knight : Risk, Ambiguity and Uncertainty

http://hdl.handle.net/10441/15504
http://hdl.handle.net/10441/15504
ef1101b8-9e6d-4288-bb10-b35d2ffecf19
名前 / ファイル ライセンス アクション
DPA31_p.1-22酒井泰弘.pdf DPA31_p.1-22酒井泰弘.pdf (261.3 kB)
Item type テクニカルレポート / Technical Report(1)
公開日 2018-06-28
タイトル
タイトル Daniel Ellsberg on J.M. Keynes and F.H. Knight : Risk, Ambiguity and Uncertainty
言語
言語 eng
キーワード
主題Scheme Other
主題 Ellsberg
キーワード
主題Scheme Other
主題 Keynes
キーワード
主題Scheme Other
主題 Knight
キーワード
主題Scheme Other
主題 risk
キーワード
主題Scheme Other
主題 ambiguity
キーワード
主題Scheme Other
主題 uncertainty
資源タイプ
資源タイプ識別子 http://purl.org/coar/resource_type/c_18gh
資源タイプ technical report
著者 Sakai, Yasuhiro

× Sakai, Yasuhiro

Sakai, Yasuhiro

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著者(ヨミ)
姓名 サカイ, ヤスヒロ
著者別名
姓名 酒井, 泰弘
抄録
内容記述タイプ Abstract
内容記述 This paper aims to focus on the life and work of Daniel Ellsberg, with an intensive discussion on its relation to J.M. Keynes and F.H. Knight, the two great pioneers of the economics of uncertainty. Ellsberg seems to be a man in paradox. When he was young, he was an outstanding researcher at Harvard University and the RAND Corporation; at the December Meting of the Econometric Society in 1960, he presented his remarkable paper in which he successfully demonstrated what we may now call Ellsberg's paradox against the traditional expected theory a la Daniel Bernoulli and von Neumann. Although it was published with the title "Risk, ambiguity and decision" in the November issue of the Quarterly Journal of Economics, it was not paid due attention for a long time. It was partly because he was so preoccupied in the 1960s and onward by letting the general public know the Pentagon papers that he could virtually have no time left to engage in purely academic activities. In the 21st century, however, the times have changed in favor of Ellsberg: we can see the dramatic return of interest in decision making under ambiguity.
Chapter Ⅱ will deal with uncertainties that are not risks. A focal point of discussion will be the similarity and difference between Keynes and Knight. Kenneth Arrow's skepticism about Knight on uncertainty will also be paid due attention. Chapter Ⅲ, the main part of this paper, will turn to the concept of ambiguity that was first introduced by Ellsberg. The two-color problem and the three color problem will systematically be examined by help of numerical representations. Chapter Ⅳ will tell us many alternative ways to solve the so-called Ellsberg paradox. Presumably, the Keynesian approach by means of interval-valued probabilities will be shown to be very simple and highly effective. In our opinion, the most amazing Ellsberg paradox lies in the fact that an accomplished economist specialized in the aversion of risk and uncertainty dared to make a personal choice to risk everything such as degrading his social status and putting him in prison for a long period. Surely, the intellectual legacy of Ellsberg seems to be an intriguing research in paradox.
引用
内容記述タイプ Other
内容記述 CRR Discussion Paper, Series A, No. A-31, pp. 1-22
書誌情報 CRR Discussion Paper, Series A

号 No. A-31, p. 1-22, 発行日 2018-06
出版者
出版者 Center for Risk Research (CRR), Shiga University
資源タイプ
内容記述タイプ Other
内容記述 Technical Report
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