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Osaka Workshop on Economics of Institutions and Organization (#131)

The next OSIPP IPP Seminar is a Special Osaka Workshop on Economics of Institutions and Organizations.

October 10, 2019

The Osaka Workshop on Economics of Institutions and Organizations,
The 131st meeting jointly organized with International Public Policy Seminar

Date: Friday, October 18, 2019, 13:30 to 16:40
Place: Osaka School of International Public Policy, Osaka University.
Conference Room, Osaka School of International Public Policy Building, Toyonaka Campus.

First Presenter –
13:30–15:00: Susumu Cato, Institute of Social Science, The University of Tokyo. (東京大学 加藤晋氏)
Title
: “Acyclicity, Anonymity, and Prefilters.” (Joint work with Walter Bossert)

We analyze the decisiveness structures associated with acyclical collective choice rules. In particular, we examine the consequences of adding anonymity to weak Pareto, thereby comple- menting earlier results on acyclical social choice. Both finite and countably infinite populations are considered. As established in contributions by Brown and by Banks, acyclical social choice is closely linked to prefilters in the presence of the weak Pareto principle. In the finite-population case, adding anonymity implies that the only decisive set is the set of the entire population if there are at least as many alternatives as individuals. When there are more individuals than alternatives, a different decisiveness structure emerges—namely, collections of decisive sets that are special cases of symmetric prefilters. Moving to infinite populations, we again obtain the entire population as the unique decisive set as a possibility, along with additional options. These consist of a new class of prefilters that we refer to as symmetric free Frechet prefilters. The choice of the term Frechet prefilter is motivated by the observation that they share a defining property with the well-known Frechet filter—namely, that all sets in the requisite collection are such that their complement is finite.Abstract: Susumu Cato

Second Presenter –
15:10-16:40: Ken-Ichi Shimomura, Research Institute for Economics and Business Administration, Kobe University. (神戸大学 下村研一氏)
Title
: “A crash course in cooperative game theory II.”

This seminar is meant to familiarize the participants with some fundamental concepts and results in cooperative game theory. In particular, I cover theory and background of classical solutions for cooperative games with coalition structures.Abstract: Ken-Ichi Shimomura

October 10, 2019by OSIPP

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