3 INET GATE VIL00100 00/10/23 12:00 題名：Tsukuba Decision Research Seminar Date: Mon, 23 Oct 2000 12:01:42 +0900 From: Kazuhisa Takemura To: CGSTDM list 認知的統計的意思決定理論研究会の皆様 　　平素はいろいろとお世話になりありがとうございます。 　　先日の土曜日に研究会でもお話したのですが、 　　今週金曜日、筑波で意思決定研究セミナー(Tsukuba Decision Research Seminar)というのを、同僚の中村豊氏（数理心理学、 数理経済学の分野で効用理論、公理的測定論を研究されてます） と開催しようということになりました。これからも続けてやっていく つもりですが、社会心理学、認知科学、実験心理学の人々と 工学や数理科学や経済学や経営学の人々とが、「意思決定」と いう現象をまな板にのせて共に議論をしていければと思っています。 今回はまとめて３つの講演をすることにしました。タイトルやアブスト ラクトは英語にしていますが、講演での使用言語は、Fan氏は英語 で、他は日本語の予定です。今回の日程やプログラムは以下のと おりです。もちろん参加はどなたでも自由で、歓迎します。 　　　　　　　　　　　　　　　　　　　　　　　　　　　　　竹村和久 　Tsukuba Decision Research Seminar 場所　筑波大学第３学群F棟2階　F22４ 　　（参考）　http://www.tsukuba.ac.jp/dMenuBar/access.html 日時　10月27日（金）　１４：００−１７：４０ 　司会　中村豊（筑波大学社会工学系） 　　　　　竹村和久（筑波大学社会工学系） 　講演１．　１４：00-15：20　松下　裕　（清水建設和泉研究室） 　　　　A Utility Reflecting a Framing Effect and the Possibility of its Application　to Portfolio Choice 　休憩　　　14:20-15:30 　講演２．15:30-16:50 竹村和久（筑波大学社会工学系） 　　　　Mental Ruler Theory: A model of judgment and some empirical 　findings 　講演３.　16:50-17:40 Fan Lun　（筑波大学大学院社会工学研究科） 　　　 Experimental studies on price judgment across different frame conditions 講演のアブストラクト 講演１ 　Yutaka Matsushita 　Izumi Research Institute, Shimizu Corporation 　A Utility Reflecting a Framing Effect and the Possibility of its 　Application　to Portfolio Choice 　Abstract: In this seminar, we will explain a utility function reflecting a certain framing effect and the possibility of its application to portfolio choice in which probabilities are not always prepared. Theoretically, we　develop such a utility function by that for non-commutative joint receipts　of lotteries, which is derived from a multilinear representation on　Archimedean weakly ordered tensor spaces. The multilinear utility is a　multiplicative form of linear utilities so that it can reflect a framing effect, which is characterized as the "casting effect" later. And then, a lexicographic representation is formulated for a mixture of commutative and　non-commutative joint receipts. As a result, we can model portfolio choice　by expected utility and multiplicative utilities reflecting the casting effect or the "miscasting effect." 講演２ Kazuhisa Takemura, Institute of Policy and Planning Sciences, University of Tsukuba Mental Ruler Theory: A Model of judgment and some empirical findings Abstract: Aims of this　presentation are , firstly, to introduce　a model of contingent judgment, called the Mental Ruler Model, secondly, to indicate fundamental derivations from the evaluation function in the Mental Ruler Model, thirdly, to compare the value function from this model with that from Prospect Theory, and lastly, to show empirical findings that support predictions from Mental Ruler Model. I will discuss on the possibility of practical applications in marketing and finance, and also discuss on the theoretical implications on psychophysical research. 講演３ Lun Fan, Doctoral Program in Policy and Planning Sciences, University of Tsukuba Experimental studies on price judgement across different frame conditions Abstract: Mental Ruler theory is an explanation of people’s decision making that violate the rational axioms as well as the most famous Prospect theory. However, it has different predictions compared with the Prospect theory. This study provides empirical proofs to the Mental Ruler theory through various experiments. Experiments are designed and executed to clarify that people’s actual price judgement can be most properly explained by Mental Ruler theory. 　　　　　　　　　　　　　　　　　　　　　　　　　　　以　上 　　　　　　　　　　　　　　　　　　　　　　　　　　　竹村和久