Name

KAWAMURA, Kohei

Official Title

Professor

Affiliation

(School of Political Science and Economics)

Sub-affiliation

Sub-affiliation

Faculty of Commerce(Graduate School of Commerce)

Faculty of Social Sciences(Graduate School of Social Sciences)

Faculty of Commerce(School of Commerce)

Affiliated Institutes

イノベーション研究所

研究所員 2018-

Paper

Expert information and majority decisions

Kawamura, Kohei; Vlaseros, Vasileios; Vlaseros, Vasileios

Journal of Public Economics 147p.77 - 882017/03-2017/03

DOIScopus

Detail

ISSN:00472727

Outline:© 2017 Elsevier B.V. This paper shows experimentally that hearing expert opinions can be a double-edged sword for collective decision making. We present a majoritarian voting game of common interest where committee members receive not only private information, but also expert information that is more accurate than private information and observed by all members. In theory, there are Bayesian Nash equilibria where the committee members' voting strategy incorporates both types of information and access to expert information enhances the efficiency of the majority decision. However, in the laboratory, expert information had excessive influence on the voting behaviour and prevented efficient aggregation of individual information. We find a large efficiency loss due to the presence of expert information especially when the committee size is large. Using an incentivized questionnaire, we find that many subjects severely underestimate the efficiency gain from information aggregation and they follow expert information much more frequently than efficiency requires. This suggests that those who understand the efficiency gain from information aggregation and perceive the game correctly might nonetheless be “stuck” in an inefficient outcome.

Research Grants & Projects

Grant-in-aids for Scientific Research Adoption Situation

Research Classification:

Economics of Contracts and Organizations

2013/-0-2018/-0

Allocation Class:¥31330000

On-campus Research System

Special Research Project

チープトークによる内生的な複数回コンサルテーションの分析

2016

Research Results Outline:引き続き共同研究者との頻繁なやり取りを通して、基礎モデルの特に3つのセットアップについて分析を進め、1つについて均衡および比較静学の導出を行った。残り引き続き共同研究者との頻繁なやり取りを通して、基礎モデルの特に3つのセットアップについて分析を進め、1つについて均衡および比較静学の導出を行った。残りの2つにセットアップについては、計算・証明作業を続行中である。引き続き共同研究者との頻繁なやり取りを通して、基礎モデルの特に3つのセットアップについて分析を進め、1つについて均衡および比較静学の導出を行った。残りの2つにセットアップについては、計算・証明作業を続行中である。

Lecture Course

Course TitleSchoolYearTerm
Management Strategies for Regional Revitalization [J] 01School of Political Science and Economics2019spring semester
Law and Economics [J] 01School of Political Science and Economics2019fall semester
Topics in Economics (Advanced Topics in Microeconomic Theory A) [E] 01School of Political Science and Economics2019fall semester
Topics in Economics (Advanced Topics in Microeconomic Theory B) [E] 01School of Political Science and Economics2019spring semester
Pre-seminar on Economics[J] (Kawamura, K)School of Political Science and Economics2019winter quarter
Seminar on Economics I [E] (Kawamura, K)School of Political Science and Economics2019spring semester
Seminar on Economics II [E] (Kawamura, K)School of Political Science and Economics2019fall semester
Seminar on Economics III [E] (Kawamura, K)School of Political Science and Economics2019spring semester
Seminar on Economics IV [E] (Kawamura, K)School of Political Science and Economics2019fall semester
Graduation Thesis [E] (Kawamura, K)School of Political Science and Economics2019spring semester
Graduation Thesis [E] (Kawamura, K)School of Political Science and Economics2019fall semester
Introduction to Microeconomics [E] 01School of Political Science and Economics2019fall quarter
Introduction to Game Theory [E] 01School of Political Science and Economics2019spring semester
Advanced Seminar I [E] 09School of Political Science and Economics2019spring semester
Advanced Seminar II [E] 09School of Political Science and Economics2019fall semester
Internship (PSE) [E] 2019-01School of Political Science and Economics2019spring semester
Internship (PSE) [E] 2019-02School of Political Science and Economics2019fall semester
Advanced Seminar III [E] 09School of Political Science and Economics2019spring semester
Advanced Seminar IV [E] 09School of Political Science and Economics2019fall semester
Thesis [E] 09School of Political Science and Economics2019fall semester
Thesis [E] 09School of Political Science and Economics2019spring semester
Management Strategies for Regional Revitalization 1School of Commerce2019spring semester
Introduction to MicroeconomicsSchool of Fundamental Science and Engineering2019fall quarter
Introduction to MicroeconomicsSchool of Creative Science and Engineering2019fall quarter
Introduction to MicroeconomicsSchool of Advanced Science and Engineering2019fall quarter
Introduction to Game TheorySchool of Fundamental Science and Engineering2019spring semester
Introduction to Game TheorySchool of Creative Science and Engineering2019spring semester
Introduction to Game TheorySchool of Advanced Science and Engineering2019spring semester
Research guidance(seminar)on Theoretical Economics A(Kawamura, K)Graduate School of Economics2019spring semester
Research guidance(seminar)on Theoretical Economics B (Kawamura, K)Graduate School of Economics2019fall semester

Waseda Course Channel Video Service

Course TitleFacultyPublication Year