TSUCHIHASHI Toshihiro's Website

TSUCHIHASHI Toshihiro (土橋俊寛) CV

Hello! I am a Professor at Daito Bunka University, Faculty of Economics. I recieved Ph.D from Hitotsubashi University.

My research focuses on Game Theory and Industrial Organization, with a primary interest in Auction Theory. My papers have been published in peer-reviewed economics journals, including the Journal of Economic Behavior & Organization and the International Journal of Game Theory.

Recently, my interests have expanded to Artificial Intelligence, particularly the use of large language models such as ChatGPT in economic experiments. I have recently published a book titled Auctioning Intelligence: Experiments with AI at the Edge of Reason.

Daito Bunka University, Faculty of Economics

1-9-1 Takashimadaira, Itabashi, Tokyo, 175-8571, JAPAN

E-mail: toshihiro.tsuchihashi<AT>gmail.com

Education

Hitotsubashi University

Ph.D, Economics, March 2010
M.A., Economics, March 2005

Tokyo Metropolitan University

B.A., Economics, March 2001

Academic Position

Daito Bunka University

Professor, April 2022-Present
Associate Professor, April 2017-March, 2022
Lecturer, April 2013-March 2016
Assistant Professor, April 2011-March 2013

Universidad Autònoma de Barcelona

Visiting Scholar, April 2018-March 2019

Institute of Intellectual Property

Research Fellow, April 2010-March 2011

Hitotsubashi University

G-COE Research Fellow, April 2010-March 2011

Books and Chapters in Books

Auctioning Intelligence: Experiments with AI at the Edge of Reason, Eliva Press, 2025.
Microeconomics and Macroeconomics for Beginners (co-authored with IKEDA Takeshi, OKADA Tomohisa, HASHIZUME Ryo, SUGANO, OURA Asuka), Zeimukeiri Kyokai Co., LTD, 2023 (in Japanese)
Game Theory Drill, Dobunkan Shuppan Co., LTD, 2023 (in Japanese)
- The following-up YouTube Channel (@GameTheoryDrill) is here (in Japanese)
Game Theory NBS, Nihon-Hyouronsya, 2018 (in Japanese).
Economics of Yahoo Auctions, Nihon-Hyouronsya, 2018 (in Japanese).
WATABE Shigeru and NAKAMURA Muneyoshi (ed.), Textbook: Japan Economy, Gakubunsya, 2013 (in Japanese); WATABE Shigeru and NAKAMURA Muneyoshi (ed.), Textbook: Japan Economy, 2nd edition, Gakubunsya, 2016 (in Japanese) (Ch. 10 "Problems of Resources and Energy in Japan.")

Peer-Reviewed Journal Publications

"Buyout Decisions of Level-k Bidders in Second-price Auctions." (co-authored with OKADA Tomohisa) Theory and Decision, 98(2), pp. 225-248, 2025. [Link Paper]
- [ResearchGate] [SSRN] (Revised at March 11, 2022)
"How Much Do You Bid? Answers from ChatGPT in FIrst-Price and Second-Price Auctions." Journal of Digital Life, 2023, 3, 11. [Link Paper] Recieved Outstanding Paper Award - Social Science - from Journal of Digital Life.
- (Previous title) "Do Ais Dream of Homo Economicus? Answers from Chatgpt." SSRN Working Paper 4498882[SSRN] (released at July 3, 2023), SSRN Working Paper 4495500 [SSRN (long version)] (released at July 10, 2023)
"A Buyout Option Alleviates Implicit Collusion in Uniform-Price Auctions." Managerial and Decision Economics, 42(5), pp. 1146-1155, July 2021. [Link Paper][PDF Draft][Appendix Draft]
- The above paper's idea is partially included in "A Revenue-enhancing Effect of a Buyout Price in Multi-unit Uniform-price Auctions." Daito Bunka University Discussion Paper No. 16-1, 2016. [Link Paper]
"Neutrality of Buyer and Seller Commissions to Auction House Proﬁt." (co-authored with ZENNYO Yusuke) Managerial and Decision Economics 42(1), pp. 209-218, January 2021. [Link Paper] [SSRN] [PDF Draft]
"Reserve Price Signaling in First-Price Auctions with an Uncertain Number of Bidders." International Journal of Game Theory 49(4), pp. 1081-1103, December 2020. [Link Paper] [PDF Draft]
"Mission Impossible: Buy Price Fails to Signal Information." Economics Bulletin 39(1), pp. 431-434, 2019. [Link PDF]
"Using Patents in Promotional Activities." Theoretical Economics Letters 6(5), pp. 907-916, 2016. (Previous title: "Using Patents for Promotion." "Patents and Trademarks as Quality Signal.") [Link PDF]
"Sequential Internet Auctions with Different Ending Rules." Journal of Economic Behavior & Organization 81(2), pp. 583-598, 2012. [Link]

Other Publications

"Trade-off Equilibrium Refinement: An Example of First-price auctions with Uncertain Number of Bidders." Keizai Kenkyu (Institute for Economic Research of Daito Bunka University), 34, pp. 45-52, March 2021. [Link Paper]
- This paper develops the discussion paper "Auctions with Uncertain Number of Bidders with Reserve Prices." Daito Bunka University Discussion Paper No. 16-3, 2016.
"Optimal Combination of Starting and Buyout Prices on Online Auctions." Toshiharu Nakamura (ed.), Issues on Modern Economic Society, Gakubunsya, 2018 (in Japanese)
"Socially Efficient Scheme to Protect Property Entitlements: Property Rule vs. Liability Rules." Keizai Ronsyu (The Economics Society Daito Bunka University), 106, 2016.
"Two Ending Rules in Online Auctions: Hard Close and Soft Close." in Ming K. Lim (ed.), Bidding: Types, Strategies and the Impact of Irrationality (Business Issues, Competition and Entrepreneurship), Nova Science Pub Inc., 2013.
"Disability Employment Levy-Grant Scheme from an Economic Viewpoint." (co-authored with OYAMA Daisuke), Japan Labor Review, 7(2), pp. 43-53, 2010. [Link PDF]

Working Papers

"Pair Up to Win tickets." (co-authored with Azusa Kurisaki) 2025. [SSRN]
"Auctions with a Buyout Price: A Survey." Daito Bunka University Discussion Paper No. 15-4, 2015. [PDF ] (Revised at January 2016 [PDF])
"The Synergy Between Sampling and Advertising." Daito Bunka University Discussion Paper No.11-1, 2011. (Revised at September 2013 [PDF])
"The Synergy Effect of Advertising-mix: Informative Advertising and Uninformative Advertising." 2008. [PDF ]
"Market Research and Complementary Advertising under Asymmetric Information." Hitotsubashi University Discussion Paper #2008-5, 2008. (Revised at January 2010 [PDF ])

Works in Progress

"Pair Up to Win Tickets." (joint with Azusa Kurisaki) Submitted.
"Undemocratic Elections under Democracy." (Joint with Asuka Oura) Submitted.
"First-price Auctions with Naive Bidders." (joint with Antonio Miralles and Chara Papioti)
"Can Market-clearing Price in Primary Markets Eliminate the Secondary Markets?" (joint with Keisuke Hattori and Yusuke Zennyo).

Seminar/Conference Presentations

26th Conference on Experimental Social Science, Waseda University (Tokyo/Japan), November 26, 2023.
XXXVII Jornadas de Economía Industrial 2023, Department of Economic Analysis of the Faculty of Economics and Business of the University of the Basque Country (UPV/EHU) (Spain), September 8, 2023.
5th Conference on "Practice of Market Design", Future Univesity Hakodate (Hokkaido/Japan), March 20, 2023.
Research seminar, Future Univesity Hakodate (Hokkaido/Japan, zoom), October 11, 2022.
EARIE 2022, Universität Wien (Austria), August 25, 2022.
TUS Game Theory Seminar, Tokyo University of Science (Tokyo/Japan), November 15, 2019.
XXXIII Jornadas de Economía Industrial 2019, Universidad de Complutense MAdrid (Spain), September 6, 2019. [Slide]
EARIE 2019, Universitat de Ponpeu Fabra (Spain), August 30, 2019. [Slide]
SING15, Turku School of Economics (Turun kauppakorkeakoulu), University of Turku (Finland), June 2, 2019.
XXXIII Jornadas de Economía Industrial 2018, Universitat de Barcelona (Spain), September 6, 2018. [Slide]
Micro Lab Seminar, Universitat Autònoma de Barcelona (Spain), April 17, 2018.
Sapporo Workshop on Industrial Economics, Sapporo Gakuin University (Hokkaido/Japan), February 22, 2018.
84th International Atlantic Economic Conference, Montreal (Canada), October 6, 2017.
2017 Japanese Economic Association Spring Meeting, Ritsumeikan University (Shiga/Japan), March 24, 2017.
Modern Economics Workshop, Yokohama National University (Kanagawa/Japan), May 11, 2017.
Workshop on Frontier of Modern Economics, Aoyama Gakuin University (Tokyo/Japan), November 16, 2016.
Contract Theory Workshop East, Hitotsubashi University (Tokyo/Japan), October 28, 2016.
Academic Seminar of Business and Economics, Okinawa International University (Okinawa/Japan), September 6, 2016.
Workshop on Microeconomic Theory and Game Theory, Tsukuba University (Ibaraki/Japan), November 20, 2013.
2013 Japanese Economic Association Spring Meeting, Toyama University (Toyama/Japan), June 6, 2013.
6th International Workshop on "Technology and Standards: Applications of Game Theory", Tokyo Institute of Technology (TIT, Tokyo/Japan), February 14-15, 2013. [PDF]
Workshop on Microeconomic Theory and Game Theory, Kyoto Institute of Economic Research (KIER, Kyoto/Japan), July 26, 2012.
Thursday Seminar, Waseda University (Tokyo/Japan), January 19, 2012.
Contract Theory Workshop, Hokkaido University (Hokkaido/Japan), August 6, 2011.
GLOPE II International Young Scholars' Conference, Waseda University (Tokyo/Japan), December 5, 2009.
2009 Japanese Economic Association Fall Meeting, Senshu University (Tokyo/Japan), October 10, 2009.
International Workshop on Mechanism Design, Hitotsubashi University (Tokyo/Japan), September 25, 2009.
14th DC Conference, Kinki University (Osaka/Japan), September 13, 2008.
3rd World Congress of the Game Theory Society, Northwestern University (US), July 12-17, 2008.
Work-in Progress Seminar (Economics), Tokyo Institute of Technology (TIT, Tokyo/Japan), December 10, 2007.
2007 Japanese Economic Association Fall Meeting, Nihon University (Tokyo/Japan), September 23-24, 2007.
13th DC Conference, Nihon University (Tokyo/Japan), September 22, 2007.
Japan-Israel Game Theory Workshop, Hitotsubashi University (Tokyo/Japan), August 2, 2007.
Hitotsubashi Game Theory Workshop, Hitotsubashi University (Tokyo/Japan), March 7, 2005.

Referee

Computing, Economics Bulletin, Hitotsubashi Economics Review, International Journal of Game Theory, Japanese Economic Review, Journal of Industrial Economics, Journal of Revenue and Pricing Management, Review of Economic Analysis and Policy, Southern Economic Journal

Research Grants

KAKENHI (Grants-in-Aid for Scientific Research), Research Project Number: 24730172 (April, 2012 - March, 2015) (¥1,820,000)

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