Feenstra, Robert; Looi Kee, Hiau - 2013
The authors study the link between export product variety and country productivity based on data from 34 industrial and … developing countries, from 1982 to 1997. They measure export product variety by the share of U.S. imports on the set of goods … suggested in the literature, export product variety depends on trade costs, such as tariffs, distance, and transport costs. Such …