變局與挑戰—貿易政策與產業組織研究群
研討日期 Date, time	2025-08-18 T 10:30-12:00
研討地點 Location	國立臺灣大學社會科學院710會議室 Room 710, College of Social Science, NTU
主講題目 Title of the paper	Emissions taxes under double-sided environmental externalities
作者 Authors of the paper	Ghina Abdul Baki, Hassan Benchekroun & Walid Marrouch
文獻出處 Journal, vol.(issue), pp	Economics Letters Volume 242, September 2024, 111884 https://doi.org/10.1016/j.econlet.2024.111884
主講人 Presenter	許志乙
參加人員 Participants	黃鴻，施姵全，許志乙，郭文忠，林晏如，鍾暳陵，丁虹仁，Micah Mainala，楊雅棠，Anggoro Prihandooko，洪睿翔
摘要 Abstract of the Paper	It is well established that if a polluter exercises market power, the optimal emission tax should be set below the Pigouvian level, i.e., the marginal damage of pollution. In this paper, we show that relying on this intuition can be misleading if pollution is generated by both production and consumption. Specifically, we build a partial equilibrium model based on a monopoly power exerted over a final product, where the production and consumption of this product impose an environmental externality. We find that the first best can be attained by a combination of taxes on pollution from production and consumption, where the tax on the polluting monopoly is set precisely at the Pigouvian level, whereas the tax on (price-taking) consumers is set below the Pigouvian level.