A Welfare Analysis of Policies Impacting Climate Change

Robert W. Hahn, Nathaniel Hendren, Robert Metcalfe () and Ben Sprung-Keyser

No 32728, NBER Working Papers from National Bureau of Economic Research, Inc

Abstract: What are the most effective ways to address climate change? This paper extends and applies the marginal value of public funds (MVPF) framework to help answer this question. We examine 96 US climate-related policy changes studied over the past 25 years. These policies span subsidies (wind, residential solar, electric and hybrid vehicles, vehicle retirement, appliance rebates, weatherization), nudges (marketing, energy conservation), and revenue raisers (fuel taxes, cap and trade). For each policy, we draw upon quasi-experimental or experimental evaluations of its causal effects and translate those estimates into an MVPF. We apply a consistent translation of these behavioral responses into measures of their associated externalities and valuations of those externalities. We also provide a new method for incorporating learning-by-doing spillovers. The analysis yields three main results: First, subsidies for investments that directly displace the dirty production of electricity, such as production tax credits for wind power and subsidies for residential solar panels, have higher MVPFs (generally exceeding 2) than all other subsidies in our sample (with MVPFs generally around 1). Second, nudges to reduce energy consumption have large MVPFs, with values above 5, when targeted to regions of the US with a dirty electric grid. By contrast, policies targeting areas with cleaner grids, such as California and the Northeast, have substantially smaller MVPFs (often below 1). Third, fuel taxes and cap-and-trade policies are highly efficient means of raising revenue (with MVPFs below 0.7). We contrast these conclusions with those derived from more traditional cost-per-ton metrics used in previous literature.

JEL-codes: H0 Q5 (search for similar items in EconPapers)
Date: 2024-07
New Economics Papers: this item is included in nep-ene, nep-env, nep-pbe and nep-reg
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