We collect extensive data on worldwide trade by transportation mode and use this to provide detailed comparisons of the greenhouse gas emissions associated with output versus international transportation of traded goods. International transport is responsible for 33 percent of world-wide...

Purchasing goods from distant locations introduces a significant lag between when a product is shipped and when it arrives. This is problematic for firms facing volatile demand, who must place orders before knowing the resolution of demand uncertainty. We provide a model in which airplanes bring...

Recent work documents declining business dynamism in the United States, with concerning implications for markups, innovation and productivity. Using import data for 146 countries over three decades we document a set of new stylized facts describing market dynamism world-wide. Market entry rates...