NATIONAL BUREAU OF ECONOMIC RESEARCH
NATIONAL BUREAU OF ECONOMIC RESEARCH

Measured Aggregate Gains from International Trade

Ariel Burstein, Javier Cravino

NBER Working Paper No. 17767
Issued in January 2012
NBER Program(s):   EFG   ITI

Do theoretical welfare gains from trade translate into aggregate measures of economic activity? We calculate the changes in real GDP and real consumption that result from changes in trade costs in a range of workhorse trade models, following the procedures outlined by statistical agencies in the United States. Our main findings are as follows: First, real GDP and measured aggregate productivity rise in response to reductions in variable trade costs if GDP deflators capture the decline in trade costs. Second, with balanced trade in each country, changes in world real consumption and changes in world real GDP (i.e.: weighting the change in each country by its nominal GDP) in response to changes in variable trade costs coincide, up to a first-order approximation, with changes in world theoretical (welfare-based) consumption. The equivalence between measured consumption and theoretical consumption holds country-by-country under stronger conditions. Third, for given trade shares and changes in variable trade costs, changes in real GDP and changes in world real consumption are approximately equal in magnitude across the models we consider.

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Document Object Identifier (DOI): 10.3386/w17767

Measured Aggregate Gains from International Trade” with Javier Cravino, March 2014, forthcoming AEJ Macro

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