Please use this identifier to cite or link to this item: https://hdl.handle.net/10419/283480 
Year of Publication: 
2023
Series/Report no.: 
Economics Working Paper Series No. 23/387
Publisher: 
ETH Zurich, CER-ETH - Center of Economic Research, Zurich
Abstract: 
We study clean energy subsidies in a quantitative climate-economy model. Clean energy subsidies decrease carbon emissions if and only if they lower the marginal product of dirty energy. The constrained-efficient subsidy equals the marginal external cost of dirty energy multiplied by the marginal impact of clean energy production on dirty energy production. With standard functional forms, two factors determine the impact of clean subsidies on dirty energy production: the elasticity of substitution between clean and dirty energy and the price elasticity of demand for energy services. At standard parameter values, clean production subsidies increase emissions and decrease welfare relative to laissez faire. With greater substitutability between clean and dirty energy, the subsidies in the Inflation Reduction Act can generate modest emissions reductions. Even in this more optimistic scenario, a clean subsidy generates significantly higher emissions and lower welfare than a tax on dirty energy.
Subjects: 
Climate Change Mitigation
Second-Best Policies
Economic Growth
JEL: 
H23
O44
Q43
Q54
Persistent Identifier of the first edition: 
Document Type: 
Working Paper

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