政大機構典藏-National Chengchi University Institutional Repository(NCCUR):Item 140.119/152134

政大機構典藏-National Chengchi University Institutional Repository(NCCUR):Item 140.119/152134

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政大典藏 > College of Social Science > Department of Public Finance > Theses > Item 140.119/152134

Please use this identifier to cite or link to this item: https://nccur.lib.nccu.edu.tw/handle/140.119/152134

Title:	整合與非整合垂直市場中的最適環境政策 Optimal Environmental Taxes in Vertical Markets: Integrated versus Non-integrated Markets
Authors:	林皇志 Lin, Huang-Chih
Contributors:	賴育邦 Lai, Yu-Bong 林皇志 Lin, Huang-Chih
Keywords:	垂直市場整合環境稅汙染外部性單一課稅工具雙重課稅工具 Vertically related market Integration Environmental tax Pollution externality Single tax instrument Multiple tax instruments
Date:	2024
Issue Date:	2024-07-01 13:29:04 (UTC+8)
Abstract:	本文研究垂直相關市場的整合與非整合對政府之最適環境政策有何影響。本文以Sugeta and Matsumoto (2007)的模型為基礎，將政府的政策工具分為單一和雙重課稅工具，並利用兩階段賽局和三階段賽局的方式分析垂直市場為整合與非整合下的最適環境稅稅率。本文發現：整合的垂直市場中，汙染外部性是市場中唯一存在的扭曲，所以政府制定的最適環境稅會等於皮古稅；非整合的垂直市場中則因為上游市場將生產要素訂價過高而存在第二重扭曲，且由於兩種扭曲的力量相反，所以政府在制定稅率時必須綜合考量兩種扭曲力量的大小。因此，若政府僅擁有單一工具，其制定的最適環境稅稅率會低於皮古稅；在雙重工具下，政府則可以針對個別扭曲進行矯正，政府會同時對上游廠商進行補貼並對下游廠商課徵皮古稅。最後，本文也發現非整合垂直市場中的下游廠商數量越多，最適環境稅稅率會遞增。 This thesis studies the impact of integration and non-integration of vertically related markets on the government's environmental tax rates. Based on the model of Sugeta and Matsumoto (2007), this article divides government policy tools into single and double taxation tools, and uses two-stage and three-stage games to analyze the relationship between different types of vertical markets and the optimal environmental tax rates. I find that there is only a single distortion caused by pollution externality in an integrated vertical market. To correct the inefficiency of the market, the government only needs to make the environmental tax rate equal to the Pigouvian tax. In a non-integrated vertical market structure, there will be a second distortion due to the upstream firm’s overcharging. Since the forces of the two distortions work in opposite directions, the government must comprehensively consider the magnitude of the two distortions when formulating tax rates. With a single tax instrument, the government must deal with the inefficiency caused by two distortions at the same time, so it has to compromise, setting the optimal environmental tax rate lower than the Pigouvian tax. With a dual tax instrument, the government can correct distortions individually and it will subsidize the upstream firm and levy a Pigouvian tax on the downstream manufacturers. Finally, I also find that the downstream market structure plays an important role in determining the tax rates. When the number of downstream manufacturers increases, the optimal environmental tax rates will be higher as well.
Reference:	林燕淑. (2010). 垂直相關市場中之策略性環境與貿易政策. 農業與資源經濟, 7(1), 73-94. Barnett, A. H. (1980). The Pigouvian Tax Rule under Monopoly. American Economic Review, 70(5), 1037-1041. Baumol, W. J., Oates, W. E. (1988). The Theory of Environmental Policy. Cambridge University Press. Buchanan, J. M. (1969). External Diseconomies, Corrective Taxes, and Market Structure. American Economic Review, 59(1), 174-177. Canton, J., Soubeyran, A., Stahn, H. (2008). Environmental Taxation and Vertical Cournot Oligopolies: How Eco-Industries Matter. Environmental and Resource Economics, 40(3), 369-382. Ebert, U. (1992). Pigouvian Taxes and Market Structure: The Case of Oligopoly and Different Abatement Technologies. Public Finance Analysis 49 (2), pp.154-166. Hamilton, S. F., Requate, T. (2004). Vertical Structure and Strategic Environmental Trade Policy. Journal of Environmental Economics and Management, 47(2), 260-269. Katsoulacos, Y., Xepapadeas, A. (1995). Environmental-Policy under Oligopoly with Endogenous Market-Structure. Scandinavian Journal of Economics, 97(3), 411-420. Ohori, S. (2012). Environmental Tax and Public Ownership in Vertically Related Markets. Journal of Industry, Competition and Trade, 12(2), 169-176. Pigou, A. C. (1920). The Economics of Welfare. Macmillan, Lodon. Simpson, R. D. (1995). Optimal Pollution Taxation in a Cournot Duopoly. Environmental and Resource Economics, 6(4), 359-369. Sugeta, H., Matsumoto, S. (2007). Upstream and Downstream Pollution Taxations in Vertically Related Markets with Imperfect Competition. Environmental and Resource Economics, 38(3), 407-432.
Description:	碩士國立政治大學財政學系 111255001
Source URI:	http://thesis.lib.nccu.edu.tw/record/#G0111255001
Data Type:	thesis
Appears in Collections:	[Department of Public Finance] Theses

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