This paper re-examines Adda and Cornaglia's (2006) evidence on the compensatory behavior of smokers who, in face of higher taxes, are found to reduce their consumption of cigarettes while maintaining their cotinine--a biomarker for nicotine--levels constant. This comment examines the robustness...

A large and growing share of world trade travels by air. We model exporters' choice between fast, expensive air cargo and slow, cheap ocean cargo, which depends on the price elasticity of demand and the value that consumers attach to fast delivery. We use US imports data that provide rich...