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Technology policy is the most widespread form of climate policy and is often preferred over seemingly efficient carbon pricing. We propose a new explanation for this observation: gains that predominantly accrue to households with large capital assets and that influence majority decisions in favor of technology policy. We study climate policy choices in an overlapping generations model with heterogeneous energy technologies and distortionary income taxation. Compared to carbon pricing, green technology policy leads to a pronounced capital subsidy effect that benefits most of the current generations but burdens future generations. Based on majority voting which disregards future generations, green technology policies are favored over a carbon tax. Smart “polluter-pays” financing of green technology policies enables obtaining the support of current generations while realizing efficiency gains for future generations., Economics Working Paper Series, 21/362

This paper examines the distributional impacts from (i) harmonizing prices for carbon dioxide emissions across sectors and EU countries and (ii) using alternative rules for carbon revenue distribution. We develop a numerical multi-country multi-sector general equilibrium model of the EU-27 economy which resolves household income deciles, based on micro-survey data on expenditure and income, and markets for fossil fuels, electricity, and (EU-wide and national) tradeable emissions rights. We find that carbon price harmonization yields efficiency gains at the EU level. The distributional effects between countries vary and depend largely on the redistribution of carbon revenues. Based on the rules currently in place in Phase IV of the EU ETS, efficiency gains flow disproportionately to low-income countries. Within-country incidence is progressive or neutral for most countries when revenue redistribution is ignored, and is not much affected by carbon price harmonization. Per-capita-based revenue redistribution rules lead to strong progressive outcomes and yield gains for low-income households. Evaluating different policy options using a social welfare function that incorporates inequality aversion suggests that there is no trade-off between efficiency and equity in harmonizing carbon prices in the EU economy.

Carbon taxes are commonly seen as a rational policy response to climate change, but little is known about their performance from an ex-post perspective. This paper analyzes the emissions and cost impacts of the UK CPS, a carbon tax levied on all fossil-fired power plants. To overcome the problem of a missing control group, we propose a novel approach for policy evaluation which leverages economic theory and machine learning techniques for counterfactual prediction. Our results indicate that in the period 2013-2016 the CPS lowered emissions by 6.2 percent at an average cost of €18 per ton. We find substantial temporal heterogeneity in tax-induced impacts which stems from variation in relative fuel prices. An important implication for climate policy is that a higher carbon tax does not necessarily lead to higher emissions reductions or higher costs., Economics Working Paper Series, 19/317 and 19/317bis

This paper examines pollution tax differentiation across industries in light of social equity concerns using theoretical and numerical general equilibrium analyses in an optimal tax framework. We characterize the drivers for non-uniform optimal taxes emanating from the interaction of household heterogeneity with social preferences. Quantitatively assessing the case of price-based CO2 emissions control in the U.S. economy, we find that optimal carbon taxes differ largely across industries, even when social inequality aversion is low. Our results are robust with respect to the stringency of the environmental target, non-optimal redistribution schemes, and parametric uncertainty in firms’ and households’ equilibrium tax responses.