Working Papers
Competing Multiproduct Intermediaries
Coming soon
Joint with Zhijun Chen and Tat-How Teh
Should Platforms be Held Liable for Defective Third-Party Goods?
The latest version is available at SSRN
The first version has been released as a CPRC Discussion Paper [PDF]
Do Agency Contracts Facilitate Upstream Collusion?
Joint with Yoshifumi Hino and Susumu Sato
Heterogeneous Consumer Expectations and Monopoly Pricing for Durables with Network Externalities
Joint with Keisuke Hattori
This paper will be superseded by a new project, "Dynamic Platform Diffusion to Users with Heterogeneous Network-Size Expectations".
Publications
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]
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]
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]
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)]
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.
Platform Encroachment and Own-Content Bias, Journal of Industrial Economics, 70(3): 684--710, September 2022. [Kobe University Repository (Open Access)] [Latest DP version]
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]
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]
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
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).
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).
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]
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]
Freemium Competition Among Ad-Sponsored Platforms, Information Economics and Policy, Volume 50, 100848, March 2020. [Latest DP version]
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]
Platform Market Competition with Endogenous Side Decisions, Journal of Economics & Management Strategy, 28(1): 73--88, Spring 2019 (co-authored with Jay Pil Choi).
Process Innovation, Application Compatibility, and Welfare, Information Economics and Policy, 40: 1--12, September 2017 (co-authored with Masayoshi Maruyama). [Latest DP version]
Corporate Social Responsibility and Strategic Relationships, International Review of Economics, 64(3): 231--244, September 2017 (co-authored with Yoshifumi Hino).
Asymmetric Payoffs and Spatial Competition, Journal of Industry, Competition and Trade, 17(1): 29--41, March 2017. [Latest DP version]
Competition between Vertically Differentiated Platforms, Journal of Industry, Competition and Trade, 16(3): 309--321, September 2016. [Latest DP version]
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).
Application Compatibility and Affiliation in Two-Sided Markets, Economics Letters, 130: 39--42, May 2015 (co-authored with Masayoshi Maruyama).
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).
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)」TBA
「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
Academic Refereeing
[Econ] American Economic Review, Journal of Political Economy, RAND Journal of Economics, International Economic Review, Journal of Industrial Economics, International Journal of Industrial Organization, Journal of Economics & Management Strategy, Journal of Economic Behavior and Organization, Games and Economic Behavior, Review of Industrial Organization, and others
[MS/OR] Management Science, Production and Operations Management, European Journal of Operational Research, and others