We use analytical and numerical models to explain and quantify the welfare effects of subsidies for artemisinin combination treatments (ACTs), a valuable new class of antimalarial drugs. There are two (second-best) efficiency rationales for such subsidies: by expanding drug use, they reduce...

This paper develops and implements an analytical framework for estimating the optimal levels and welfare effects of alcohol taxes and drunk-driver penalties, accounting for externalities and how policies interact with the broader fiscal system. We find that the fiscal component of the optimal...