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Working Paper
Pollution Taxes and Clean Subsidies in an Open Economy
In open economies, the effectiveness of carbon taxes is diminished by “pollution leakage,” where some polluting activity shifts abroad because of the tax. This paper shows that the same conditions that lead to pollution leakage enhance the efficacy of clean subsidies. As a result, the optimal policy in an open economy combines a pollution tax and a clean subsidy, the balance of which depends on the leakage rate. Furthermore, efficient policy sets the sum of the tax and subsidy rates, a measure of policy ambition, equal to the marginal damages from pollution, and does not depend on the ...
Working Paper
Time-Limited Subsidies: Optimal Taxation with Implications for Renewable Energy Subsidies
Pigouvian subsidies are efficient, but output subsidies with uncertain or limited durations are not Pigouvian. We show that optimal “time-limited” policies must also subsidize investment to correct externalities generated after the output subsidy ends. Furthermore, an output subsidy’s optimal duration is characterized by the change in production when it ends. In the wind-energy industry, we find that power generation decreases by 5-10% after the end of facilities’ ten-year eligibility for the Renewable Energy Production Tax Credit. This behavioral response has implications for energy ...
Working Paper
Public Debt Levels and Real Interest Rates: Causal Evidence from Parliamentary Elections
We use close parliamentary elections as natural experiments to estimate the debt sensitivity of interest rates. Relative to an election in which one party barely secures a majority, an election in which no party achieves a majority causes the debt-to-GDP ratio to increase by 17 percentage points, while real interest rates rise by 99 basis points. If elections only impact real rates via debt, our results imply that a one percentage point increase in the debt-to-GDP ratio causes a 5.8 basis point increase in real rates, larger than most previous estimates and suggesting potential reverse ...