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Faculty of Economics

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Rafaty, R., Dolphin, G., Pretis, F.

Carbon pricing and the elasticity of CO2 emissions

CWPE20116

Abstract: We study the impact of carbon pricing on CO2emissions across five sectors for a panel of 39 countries over 1990-2016. Using newly constructed sector-level carbon price data, we implement a novel approach to estimate the changes in CO2emissions associated with (i) the introduction of carbon pricing regardless of the price level; (ii) the implementation effect as a function of the price level; and (iii) post-implementation marginal changes in the CO2price.We find that the introduction of carbon pricing has reduced growth in CO2emissions by 1% to 2.5% on average relative to counterfactual emissions, with most abatement occurring in the electricity and heat sector. Exploiting variation in carbon pricing to explain heterogeneity in treatment effects, we find an imprecisely estimated semi-elasticity of a 0.05% reduction in emissions growth per average $1/metric ton (hereafter abbreviated as: ton) of CO2.After the carbon price has been implemented, each marginal price increase of $1/tCO2 has temporarily lowered the growth rate of CO2emissions by around 0.01%. These are disappointingly small effects. Simulating potential future emissions reductions in response to carbon price paths, we conclude that –in the absence of complementary non-pricing policy interventions – carbon pricing alone, even if implemented globally, is unlikely to be sufficient to achieve emission reductions consistent with the Paris climate agreement.

Keywords: Carbon Pricing, CO2 Emissions, Decarbonization, Carbon Tax, Climate Change, Climate Policy

JEL Codes: Q43 Q48 Q54 Q58 H23

Author links:

PDF: http://www.econ.cam.ac.uk/research-files/repec/cam/pdf/cwpe20116.pdf

EPRG Paper Link: 2035

Open Access Link: https://doi.org/10.17863/CAM.62831