第167回「制度と組織の経済学」研究会 (共催：IPP研究会） 開催のお知らせ

「制度と組織の経済学」研究会はOEIO（The Osaka Workshop on Economics of Institutions and Organizations：東京大学社会科学研究所と大阪大学IPP研究会による研究会）の主催により、理論研究・実証研究を問わず、ミクロ経済理論、マクロ経済理論、経済史等をテーマに研究しています。 皆様のご参加をお待ちしております。

Presenter： 松村敏弘 氏（ 東京大学 社会科学研究所 ）

Title： ” Optimal Energy-Saving Investments and Jevons Paradox in Duopoly Markets ”

Abstract： This study theoretically investigates energy-saving investment incentives in duopolies. First, we investigate a binary choice model in which each firm chooses whether to make an energy-saving investment and then they face Cournot competition. We focus on the incentive to become the leading firm by the investment, when the rival does not engage in this project. We find the private incentive to be insufficient for welfare (thereby requiring promotion through policies), if Pigouvian tax is imposed. However, this incentive can be excessive when the emission tax rate is lower than the Pigouvian level. Next, we investigate a model in which firms can choose energy-saving investment levels continuously. We find that the equilibrium investment can be (is not) excessive for welfare when the emission tax rate is lower than (equal to) the Pigouvian. These results suggest that policy formation combining a low emission tax and subsidies for promoting energy-saving investments may harm welfare. Moreover, we find that drastic innovation rather than minor improvement of energy efficiency should be subsidized because the former less likely leads to Jevons paradox.

論文： https://ideas.repec.org/p/pra/mprapa/121836.html

詳細：https://www.osipp.osaka-u.ac.jp/ja/oeio-167/