New■2025年度　第3回　大阪大学経済学研究会　のご案内（IPP研究会共催）

日時：2025年5月22日（木）13：30～15：00

会場：豊中キャンパスOSIPP棟6階　会議室

講師：伊神　満 氏（University of Toronto ）

タイトル："Welfare Gains from Product and Process Innovations: The Case of LCD Panels, 2001-2011"

アブストラクト：We used unusually detailed data on sales, costs, and investments from the global industry of liquid crystal display (LCD) panels to study the welfare consequences of various types of innovation. Product and process innovations account for 70.6% and 38.9% of total welfare, respectively, with substantial heterogeneity between market segments. The social return on technological investments is unambiguously positive, but the private returns for most firms are negligible because of competition. Simulations suggest the industry-wide incentive to innovate tends to increase with seven-to-six and six-to-five mergers, but the effect becomes mostly negative in subsequent consolidation. We conclude with antitrust policy implications.

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 Time and Date:  13：30～15：00, Thursday, May, 22th 

 Seminar Venue: The Conference Room (会議室) on the 6th floor of OSSIP棟 in Toyonaka Campus

 Presenters:  Mitsuru Igami 氏 (University of Toronto)　 　

 Title: "Welfare Gains from Product and Process Innovations: The Case of LCD Panels, 2001-2011"

 Abstract: We used unusually detailed data on sales, costs, and investments from the global industry of liquid crystal display (LCD) panels to study the welfare consequences of various types of innovation. Product and process innovations account for 70.6% and 38.9% of total welfare, respectively, with substantial heterogeneity between market segments. The social return on technological investments is unambiguously positive, but the private returns for most firms are negligible because of competition. Simulations suggest the industry-wide incentive to innovate tends to increase with seven-to-six and six-to-five mergers, but the effect becomes mostly negative in subsequent consolidation. We conclude with antitrust policy implications.

■今後のスケジュール

日時：2025年5月29日（木）13：30～15：00

会場：豊中キャンパスOSIPP棟6階　会議室

講師：国本　隆氏（一橋大学 ）

タイトル：Rationalizable Incentives: Interim Rationalizable Implementation of Correspondences 

アブストラクト：When the normative goals for a set of agents can be summarized in a set-valued rule and agents take actions that are rationalizable, a new theory of incentives emerges in which standard Bayesian incentive compatibility (BIC) is relaxed significantly. The paper studies the interim rationalizable implementation of social choice sets with a Cartesian product structure, a leading example thereof being ex-post efficiency. Setwise incentive compatibility (setwise IC), much weaker than BIC, is shown to be necessary for implementation. Setwise IC enforces incentives flexibly within the entire correspondence, instead of the pointwise enforcement entailed by BIC. Sufficient conditions, while based on the existence of SCFs in the correspondence that make truthful revelation a dominant strategy, are shown to be permissive to allow the implementation of ex-post efficiency in many settings where equilibrium implementation fails (e.g., bilateral trading, multidimensional signals). Furthermore, this success comes at little cost: all our mechanisms are well behaved, in the sense that best responses always exist.

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日時：2025年6月5日（木）13：30～15：00

会場：豊中キャンパスOSIPP棟6階　会議室

講師：Juan Pantano氏（University of Arizona  ）

タイトル：TBA

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日時：2025年6月26日（木）13：30～15：00

会場：豊中キャンパスOSIPP棟6階　会議室

講師：Ali Bakhtawar (Aix-Marseille Shcool of Economics)

タイトル：TBA

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日時：2025年7月31日（木）13：30～15：00

会場：豊中キャンパスOSIPP棟6階　会議室

講師：高橋　裕希(Tilburg University）

タイトル：TBA

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