RESEARCH

Publications

1. Incumbent Repositioning Against a Quality (Dis)Advantaged Entrant with Spillover Effects, Journal of Business Research, Volume 192, 115313, April 2025 (co-authored with Morifumi Hirao). [Latest DP version]

2. A Model of Mobile App and Ad Platform Markets, International Journal of Industrial Organization, Volume 97, 103117, December 2024. [Latest DP version]

   • This paper was formerly circulated with the title "Cross-Market Platform Competition in Mobile App Economy" as a CPRC Discussion Paper [PDF]

3. Product Variety and Design in the Age of Peer-to-Peer Sharing, Journal of Economics & Management Strategy, 33(4): 825--844, Winter 2024. [Latest DP version]

4. Self-Preferencing by Platforms: A Literature Review, Japan and the World Economy, Volume 66, 101191, June 2023 (co-authored with Yuta Kittaka and Susumu Sato). [CPRC Discussion Paper (PDF)] [日本語版 (PDF)] [Kobe University Repository (Open Access)]

5. Welfare Effects of Socially Conscious Platforms in Two-Sided Markets,  The B.E. Journal of Economic Analysis and Policy, 23(1): 243--251, January 2023 (co-authored with Hayama Abe). [Kobe University Repository (Open Access)]

   • This note is based on the co-author's undergraduate thesis written under my supervision.

6. Platform Encroachment and Own-Content Bias, Journal of Industrial Economics, 70(3): 684--710, September 2022. [Kobe University Repository (Open Access)] [Latest DP version] 

7. Consumer Rebates from E-Commerce Platforms and Multi-Channel Management of Third-Party Sellers, Managerial and Decision Economics, 43(7): 3059--3071, October 2022 (co-authored with Aika Monden). [Latest DP version]

8. Retailer Voluntary Investment Against a Threat of Manufacturer Encroachment, Marketing Letters, 32(4): 379--395, December 2021  (co-authored with Jumpei Hamamura). [Latest DP version]

9. Platform Information Transparency and Effects on Third-Party Suppliers and Offline Retailers,  Production and Operations Management, 30(11): 4219--4235, November 2021 (co-authored with Yushi Tsunoda). [Kobe University Repository (Open Access)]

   • This study supersedes my old work: "Strategic Contracting and Supplier Encroachment Through an E-commerce Platform" (November 11, 2019). Available at SSRN

10. Revenue‐Sharing Contracts under Demand Uncertainty in Shopping Center, Real Estate Economics, 49(2): 556--573, Summar 2021 (co-authored with Aika Monden and Katsuyoshi Takashima).

11. Duration of Price Promotion and Retail Profit: An In-depth Study Based on Point-of-Sale Data, Journal of Retailing and Consumer Services, Volume 58, 102277, January 2021 (co-authored with Zhen Li and Katsutoshi Yada).

12. Neutrality of Buyer and Seller Commissions to Auction House Profit,  Managerial and Decision Economics, 42(1): 209--218, January 2021 (co-authored with Toshihiro Tsuchihashi). [Latest DP version]

13. Platform Most-Favored-Customer Clauses and Investment Incentives, International Journal of Industrial Organization, Volume 70, 102617, May 2020 (co-authored with Masayoshi Maruyama). [Latest DP version]

14. Freemium Competition Among Ad-Sponsored Platforms, Information Economics and Policy, Volume 50, 100848, March 2020. [Latest DP version]

15. Strategic Contracting and Hybrid Use of Agency and Wholesale Contracts in E-Commerce Platforms,  European Journal of Operational Research, 281(1): 231--239, February 2020. [Latest DP version]

16. Platform Market Competition with Endogenous Side Decisions, Journal of Economics & Management Strategy, 28(1): 73--88, Spring 2019 (co-authored with Jay Pil Choi).

17. Process Innovation, Application Compatibility, and Welfare, Information Economics and Policy, 40: 1--12, September 2017 (co-authored with Masayoshi Maruyama). [Latest DP version]

18. Corporate Social Responsibility and Strategic Relationships, International Review of Economics, 64(3): 231--244, September 2017 (co-authored with Yoshifumi Hino).

19. Asymmetric Payoffs and Spatial Competition, Journal of Industry, Competition and Trade, 17(1): 29--41, March 2017. [Latest DP version]

20. Competition between Vertically Differentiated Platforms, Journal of Industry, Competition and Trade, 16(3): 309--321, September 2016. [Latest DP version]

21. Platform Selection by Software Developers: Theory and Evidence, Journal of the Japanese and International Economies, 38: 282--303, December 2015 (co-authored with Masayoshi Maruyama, David Flath, Kazumitsu Minamikawa, and Ken-ichi Ohkita).

22. Application Compatibility and Affiliation in Two-Sided Markets, Economics Letters, 130: 39--42, May 2015 (co-authored with Masayoshi Maruyama).

23. Compatibility and the Product Life Cycle in Two-Sided Markets, Review of Network Economics, 12(2): 131--155, May 2013 (co-authored with Masayoshi Maruyama).

24. A Note on the Desirability of Merger among Complements, Journal of Industry, Competition and Trade, 11(1): 57--65, March 2011 (co-authored with Masayoshi Maruyama and Kazumitsu Minamikawa).

Books

日本語 (in Japanese)

• 連載「プラットフォームの経済学」経済セミナー、日本評論社 (佐藤進との共著)

  • 第1回「プラットフォーム経済学への招待」2024年6・7月号

  • 第2回「プラットフォーム・ビジネスを軌道に乗せる」2024年8・9月号

  • 第3回「人をバランス良く集める：二面プライシング」2024年10・11月号

  • 第4回「集まった人を管理する (1)：取引からの収益化」2024年12月・2025年1月号

  • 第5回「集まった人を管理する (2)：取引プラットフォームのデザイン」2025年4・5月号

  • 第6回「広告収益型メディア (前編)」2025年8・9月号

  • 第7回「広告収益型メディア (後編)」2025年10・11月号

• 「サービソロジーへの経済学的アプローチ　パネル討論」(座長 : 石川竜一郎、パネリスト : 森川正之、持丸正明、善如悠介、西野成昭)『現代経済学の潮流』、東京大学出版会、TBA

• 「プラットフォームによる自己優遇の経済分析」(橘髙勇太、佐藤進との共著)、根岸哲・泉水文雄・和久井理子編著『プラットフォームとイノベーションをめぐる新たな競争政策の構築』、商事法務、2023年7月

• 「応用理論で論文を書く --- 産業組織論のケース」、経済セミナー編集部編『経済論文の書き方』、日本評論社、2022年9月

Other Publications

in English

• Mobile Ecosystems: Competition and Transparency, Competition Policy International, Antitrust Chronicle --- Asia Pacific: Opportunities & Challenges, March 24, 2022

日本語 (in Japanese)

• 「プラットフォームはそこで取引された財の欠陥・不具合についても責任を問われるべきか？」公正取引、No. 874、2023年8月

  • CPRC ディスカッション・ペーパー  (CPDP-93-E "Should Platforms be Held Liable for Defective Third-Party Goods?") の実務家向け日本語解説

• 「プラットフォームによる自己優遇に関する経済学文献のレビュー」CPRC ディスカッション・ペーパー 、CPDP-89-2-J、2022年5月 (橘髙勇太、佐藤進との共著)

• 「シェアリングエコノミーの普及とプラットフォームの役割」名古屋港、239巻、2022年3月号

• 「プラットフォーム自らが財を販売する行為とそれが大小売手に与える影響」国民経済雑誌、第224巻 第4号、2021年10月

• 「プラットフォーム特権は利用者の不利益となるか」週間東洋経済 『経済学者が読み解く現代社会のリアル』、2020年11月21日号 

• 「製品差別化とネットワーク外部性」国民経済雑誌、第220巻 第5号、2019年11月