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On the Spillover Effects of CO2 Taxation on the Emissions of other Air Pollutants

Alfredo Pereira () and Rui Pereira

No 131, GEE Papers from Gabinete de Estratégia e Estudos, Ministério da Economia

Abstract: In this paper, we compare and contrast the environmental, macroeconomic and distributive effects of CO2 taxation with the effects of taxing a variety of air pollutants at their external costs. We do so using a multi-sector and multi-household dynamic computable general equilibrium model of the Portuguese economy. We find that a carbon tax of 114 euros per ton of CO2 is necessary to achieve the IPCC 2030 targets. It does so, however, at a high macroeconomic and distributional cost. In turn, the macroeconomic and distributional effects of taxing different pollutants at their external costs in line both qualitatively and quantitatively with the effects of the CO2 taxation. In absolute terms, however, better environmental results in terms of GHG and air pollutants emissions are achieved through the level of CO2 taxation necessary to achieve the IPCC targets than through direct taxation of such emissions at their external costs. Ultimately, the benefits of complementing the CO2 taxation with the taxation of other air pollutants at their external costs does not seem significant from either efficiency, fairness, or environmental perspectives to justify the practical complexity of considering it.

Keywords: CO2 Taxation; Taxation of Air Pollutants; Co-Pollutants; Spillover Effects of CO2 taxation; IPCC Targets; General Equilibrium; Portugal. (search for similar items in EconPapers)
Pages: 16 pages
Date: 2019-08, Revised 2019-08
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http://www.gee.gov.pt//RePEc/WorkingPapers/GEE_PAPERS_131.pdf First version, 2019 (application/pdf)

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Persistent link: https://EconPapers.repec.org/RePEc:mde:wpaper:0131

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