Carbon Pricing, Clean Electricity Standards, and Clean Electricity Subsidies on the Path to Zero Emissions

Severin Borenstein and Ryan Kellogg

Environmental and Energy Policy and the Economy, 2023, vol. 4, issue 1, 125 - 176

Abstract: We categorize the primary incentive-based mechanisms under consideration for addressing greenhouse gas emissions from electricity generation—pricing carbon, setting intensity standards, and subsidizing clean electricity—and compare their market outcomes under similar expansions of clean electricity generation. Although pricing emissions gives strong incentives to first eliminate generation with the highest social cost, a clean electricity standard incentivizes earliest phaseout of the generation with the highest private cost. We show that the importance of this distinction depends on the correlation between private costs and emissions rates. We then estimate this correlation for US electricity generation and fuel prices as of 2019. The results indicate that the emissions difference between a carbon tax and clean electricity standard that phase out the fossil fuel generation over the same time frame may actually be quite small, though it depends on fossil-fuel prices during the phaseout. We also discuss how each of these policy options is likely to affect electricity prices, quantity demanded, government revenue, and economic efficiency. Large preexisting markups of retail electricity prices over marginal costs are likely to considerably weaken or even reverse the usual assumed efficiency advantage of carbon pricing policies over alternatives, including direct subsidization of clean electricity generation.

Date: 2023
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Chapter: Carbon Pricing, Clean Electricity Standards, and Clean Electricity Subsidies on the Path to Zero Emissions (2022)
Working Paper: Carbon Pricing, Clean Electricity Standards, and Clean Electricity Subsidies on the Path to Zero Emissions (2022)
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