Abstract
Recent literature has investigated whether the welfare gains from environmental taxation are larger or smaller in a second-best setting than in a first-best setting. This question has mainly been addressed indirectly, by asking whether the second-best optimal environmental tax is higher or lower than the first-best Pigouvian rate. Even this indirect question has itself been approached indirectly, comparing the second-best optimal environmental tax to a proxy for its first-best value, marginal social damage (MSD). On closer examination, however, MSD becomes ambiguously defined and variable in a second-best setting making it an unreliable proxy for the Pigouvian rate. Given these observations, the current analysis reevaluates these welfare questions and finds that when compared directly to its first-best value, the second-best optimal environmental tax generally rises with increased revenue requirements. Even in cases where the second-best environmental tax is lower than its first-best value, the welfare gains may be greater than in a first-best setting. These results suggest that the marginal fiscal benefit (revenue recycling effect) exceeds the marginal fiscal cost (tax base effect) over a range of environmental tax rates that, for benchmark models, extends above the first-best Pigouvian rate. These findings reinforce the intuition that environmental policy complements rather than competes with the provision of other public goods.
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Jaeger, W.K. The Welfare Effects of Environmental Taxation. Environ Resource Econ 49, 101–119 (2011). https://doi.org/10.1007/s10640-010-9426-x
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DOI: https://doi.org/10.1007/s10640-010-9426-x