Data Webpage for "Transportation Costs and International Trade in the Second Era of Globalization", Journal of Economic Perspectives, Vol 21, No 3, pp 131-154
Data and programs for The Variety and Quality of a Nation's Exports (American Economic Review 95 (2005) 704-723)
Data and documentation on international trade by transport mode and emissions from "Trade and the Greenhouse Gas Emissions from International Freight Transport" NBER 17117
Useful links to concordances, trade data and other data sources at the Forum for Research in Empirical International Trade