SEARCH
Search Details
SADAKANE HitoshiGraduate School of Business Administration / Division of Business AdministrationAssociate Professor
Research activity information
■ Award- Mar. 2017 神戸大学大学院経営学研究科, 第4回伊賀隆賞, Essays on Strategic Information Transmission
- Dec. 2016 Institute of Social and Economic Research, Osaka University, ISER Moriguchi Prize, Multistage Information Transmission with Voluntary Monetary Transfer
- Jun. 2013 神戸大学, 平成 25 年度六甲台後援会創立 50 周年記念社会科学特別奨励賞（凌霜賞）
- Jan. 2023, Theoretical Economics, 18(1) (1), 267 - 301, EnglishMultistage Information Transmission with Voluntary Monetary Transfers[Refereed]Research institution
- Jun. 2022, SSRN 4179251, EnglishCheap talk and Lie detectionScientific journal
- Dec. 2021, 国民経済雑誌, 224(6) (6), 71 - 83, JapaneseEffects of Auction Formats on Communication in OrganizationsResearch institution
- Corresponding, Dec. 2020, KIER Discussion Paper No. 1050, EnglishCommunication Enhancement through Information Acquisition by Uninformed PlayerResearch society
- Corresponding, Aug. 2020, Working Paper, EnglishDiversification and decentralization: The roles of organizational inertia and diversityScientific journal
- Corresponding, Aug. 2019, NCDS Working Paper No.76, EnglishBertrand Competition with One-sided Cost UncertaintyScientific journal
- Nov. 2017, Working paper, EnglishComplementarity between Communication and InvestigationResearch society
- Mar. 2017, Kobe University, EnglishEssays on Strategic Information TransmissionDoctoral thesis
- Kobe University, Apr. 2016, Kokumin Keizai-zasshi, 213(4) (4), 43 - 59, JapaneseScientific journal
- 8th Annual Communication Theory Workshop a.k.a. Cheap Talk Festival, Dec. 2021Cheap Talk and Lie Detection
- September Workshop on Economics at Otaru, Oct. 2021Cheap talk and Lie detection
- Economic Theory Workshop at Hitotsubashi University, Oct. 2021Cheap Talk and Lie Detection
- 6th World Congress of the Game Theory Society, Jul. 2021, EnglishDiversification and DecentralizationOral presentation
- CIRJE Microeconomics Workshop, Jun. 2021, EnglishCheap Talk and Fact-checkingOral presentation
- 法政大学経済学部学会研究会, Dec. 2020Cheap Talk Game with Fact-checkingOral presentation
- 関西ゲーム理論研究会, Nov. 2020Cheap Talk Game with Fact-checking
- 東京理科大学ゲーム理論セミナー, Nov. 2020Diversification and DecentralizationOral presentation
- World Congress of the Econometric Society 2020, Aug. 2020, EnglishWhen Does Diversification Require Decentralization?Oral presentation
- Workshop on Microeconomics and Game Theory Institute of Economic Research, Kyoto University, Jul. 2020, EnglishDiversification and DecentralizationOral presentation
- Workshop on Microeconomics and Game Theory Institute of Economic Research, Kyoto University, Dec. 2019, EnglishWhen Does Diversification Require Decentralization?Oral presentation
- CIREQ Micro, Mar. 2019, EnglishIntra-Firm Communication in OligopolyOral presentation
- 6th Annual Communication Theory Workshop, Dec. 2018, EnglishIntra-Firm Communication and Organizational Design in a Cournot Competition with Strategic InvestmentsOral presentation
- Workshop on Microeconomics and Game Theory Institute of Economic Research, Kyoto University, Mar. 2018, EnglishInformation Aggregation through Communication and InvestigationOral presentation
- Yonsei-Kyoto-Osaka Economic Theory Workshop, Jan. 2018Communication Enhancement through Information Acquisition by Uninformed PlayerOral presentation
- The Osaka Workshop on Economics of Institutions and Organizations, Dec. 2017, Japanese, Domestic conferenceComplementarity between Communication and InvestigationOral presentation
- The 23rd Decentralization Conference in Japan, Sep. 2017, Japanese, Domestic conferenceCommunication Enhancement through Information Acquisition by Uninformed PlayerOral presentation
- SWET: Summer Workshop on Economic Theory, Aug. 2017, Japanese, Domestic conferenceComplementarity between Communication and InvestigationOral presentation
- International Conference on Game Theory at Stony Brook, Jul. 2017, English, International conferenceMultistage Information Transmission with Voluntary Monetary TransferOral presentation
- Japanese Economic Association Spring Meeting, Jun. 2017, Japanese, Domestic conferenceCommunication Enhancement through Information Acquisition by Uninformed PlayerOral presentation
- Asia Meeting of the Econometric Society, Jun. 2017, English, International conferenceCommunication Enhancement through Information Acquisition by Uninformed PlayerOral presentation
- AEI-Five Conference, May 2017, English, International conferenceMultistage Information Transmission with Voluntary Monetary TransferOral presentation
- Workshop on Microeconomics and Game Theory Institute of Economic Research, Kyoto University, Apr. 2017, English, Domestic conferenceCommunication Enhancement through Information Acquisition by Uninformed PlayerOral presentation
- Asia Meeting of the Econometric Society, Aug. 2016, EnglishMultistage Information Transmission with Voluntary Monetary TransferOral presentation
- 日本経済学会春季大会2016, Jun. 2016Multistage information transmission with voluntary monetary transferOral presentation
- American Economic AssociationFeb. 2018 - Present
- The Econometric SocietyFeb. 2016 - Present
- The Japanese Economic AssociationFeb. 2016 - Present
- Game Theory SocietyFeb. 2020
- Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C), Grant-in-Aid for Scientific Research (C), Kobe University, 01 Apr. 2022 - 31 Mar. 2025Analysis on reputation effects in finitely repeated games with one-sided incomplete information
- 日本学術振興会, 科学研究費助成事業 基盤研究(B), 基盤研究(B), 早稲田大学, 01 Apr. 2019 - 31 Mar. 2023情報伝達の経済理論・実験分析と国際研究ネットワーク形成２０１９年度は国内ワークショプは予定通り開催できたものの、当該年度に計画されていた２件の海外研究者招聘によるワークショップ開催は、１件は招聘研究者の家庭の事情により、もう１件は新型コロナウィルスの影響により中止となり、更に２０２０年度においても旅行制限により招聘を実施することができなかった。そこで２０２１年度から海外在住の研究者によるオンライン研究会を定期開催し、合わせてインフォーマルな研究交流の機会を設けた。その結果、研究代表者や研究分担者の研究に資する、多くのフィードバックを得ることができた。
こうしたフィードバックをもとに、研究代表者はメディアとオンラインテクノロジーの動学チープトーク分析を深化させ、新たな厚生分析を加えることで、オンラインニュースへのアクセスのコストが（ネットニュースの充実等により）低くなるほど、ニュース記事の情報の信頼性が低下し、読者の厚生が低下する可能性を示した。また、逐次的コンサルテーションのチープトークモデルに取り組み、情報の受け手が複数の専門家を逐次的に訪れる際には、その訪問順序をランダムにすることにコミットすることにより、専門家同士の利害による情報の操作を抑え、結果として情報の受け手はより多くの情報を得られることを示した。
この間の研究分担者による研究成果としては、コロナウイルスのような特異な現象が発生した際に政府が情報を秘匿する要因の研究、組織におけるメンバーの退出と発言の相互作用についての研究、インフォーマルな権限委譲（エンパワメント）が部下からの情報伝達を阻害する状況についての研究、チープトークゲームにおいて金銭授受の可能性があれば支払条件等にコミットでき「なくても」均衡における情報伝達量を増やすことを示す研究、が挙げられる。 - Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Research Activity Start-up, Grant-in-Aid for Research Activity Start-up, Kyoto University, 25 Aug. 2017 - 31 Mar. 2019This research project theoretically analyzed strategic information transmission in an organization and investigated the optimal mechanism in the organizational decision-making process. Specifically, we focused on the mechanism with monetary transfers between the sender and the receiver, and showed that multistage information transmission with voluntary transfer payments can be more beneficial for the receiver than a wide class of other communication protocols. The results have important implications for the theory of organizational economics regarding designing communication protocols and organizational structures.