Input-output technologies and the effects of tariff reductions

Using input-output (IO) tables from several developed countries (United States, EEC, and Japan) and one developing country (Brazil), we calculate the effects of tariff removal using various combinations of these tables to represent technologies for the countries included in the Michigan Computational Model of World Production and Trade. Among the IO tables, Brazil's reflected unusually high shares of value added, low labor shares, and small supply elasticities. Supply elasticities for the developed countries were somewhat lower than for the United States. Using the Michigan model, our calculated effects of tariff reductions are overstated using the U.S. IO table to represent technologies for other developed countries. Further, for developing countries that use import licensing, the model shows considerable sensitivity to IO table specification. It is especially important, therefore, for computational purposes to obtain the most accurate information possible about IO structures of developing countries.