河村 耕平 (カワムラ コウヘイ)

写真a

所属

政治経済学術院 政治経済学部

職名

教授

ホームページ

http://www.f.waseda.jp/kkawamura/

兼担 【 表示 / 非表示

  • 商学学術院   大学院商学研究科

  • 商学学術院   商学部

  • 社会科学総合学術院   大学院社会科学研究科

学内研究所等 【 表示 / 非表示

  • 2019年
    -
     

    産業経営研究所   兼任研究所員

学位 【 表示 / 非表示

  • University of Oxford   DPhil

 

論文 【 表示 / 非表示

  • Strategic central bank communication: Discourse analysis of the Bank of Japan's Monthly Report

    Kawamura Kohei, Kobashi Yohei, Shizume Masato, Ueda Kozo

    JOURNAL OF ECONOMIC DYNAMICS & CONTROL   100   230 - 250  2019年03月  [査読有り]

    DOI

  • Expert information and majority decisions

    Kohei Kawamura, Vasileios Vlaseros

    JOURNAL OF PUBLIC ECONOMICS   147   77 - 88  2017年03月  [査読有り]

     概要を見る

    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. (C) 2017 Elsevier B.V. All rights reserved.

    DOI

  • Confidence and competence in communication

    Kohei Kawamura

    THEORY AND DECISION   78 ( 2 ) 233 - 259  2015年02月  [査読有り]

     概要を見る

    This paper studies information transmission between an uninformed decision maker (receiver) and an informed agent (sender) who have asymmetric beliefs ("confidence") on the sender's ability ("competence") to observe the state of nature. We find that even when the material payoffs of the players are perfectly aligned, the sender's over- and underconfidence on his information give rise to information loss in communication, although they do not by themselves completely eliminate information transmission in equilibrium. However, an underconfident sender may prefer no communication to informative communication. We also show that when the sender is biased, overconfidence can lead to more information transmission and welfare improvement.

    DOI

  • SPILLOVERS OF EQUAL TREATMENT IN WAGE OFFERS

    Kohei Kawamura, Jozsef Sakovics

    SCOTTISH JOURNAL OF POLITICAL ECONOMY   61 ( 5 ) 487 - 501  2014年11月  [査読有り]

     概要を見る

    We analyse a labour-matching model with wage posting, where - reflecting institutional constraints - firms cannot differentiate their wage offers within certain subsets of workers. Inter alia, we find that the presence of impersonal wage offers leads to wage compression, which propagates to the wages for high productivity workers who receive personalized offers.

    DOI

  • Biasing selection contests with ex-ante identical agents

    Kohei Kawamura, Ines Moreno de Barreda

    ECONOMICS LETTERS   123 ( 2 ) 240 - 243  2014年05月  [査読有り]

     概要を見る

    This note shows that when the designer of a contest wishes the winner have high ability, she is better off giving a head start to one of the contestants even if they are ex-ante identical. If the contestants are ex-ante asymmetric, the designer should give a head start to the one who is more likely to have high ability. (C) 2014 Elsevier B.V. All rights reserved.

    DOI

全件表示 >>

特定課題研究 【 表示 / 非表示

  • 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年  

     概要を見る

    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。