University of British Columbia
Sauder School of Business
2053 Main Mall
Vancouver, B.C., Canada, V6T 1Z2
NBER Working Papers and Publications
|October 2000||Increasing Returns and All That: A View From Trade|
with Daniel Trefler: w7941
Do scale economies contribute to our understanding of international trade? Do international trade flows encode information about the extent of scale economies? To answer these questions we examine the large class of general equilibrium theories that imply Helpman-Krugman variants of the Vanek factor content prediction. Using an ambitious database on output, trade flows, and factor endowments, we find that scale economies significantly increase our understanding of the sources of comparative advantage. Further, the Helpman-Krugman framework provides a remarkable lens for viewing the general equilibrium scale elasticities encoded in trade flows. In particular, we find that a third of all goods-producing industries are characterized by scale. (The modal range of scale elasticities for this g...
Published: Werner Antweiler & Daniel Trefler, 2002. "Increasing Returns and All That: A View from Trade," American Economic Review, American Economic Association, vol. 92(1), pages 93-119, March. citation courtesy of
|August 1998||Is Free Trade Good for the Environment?|
with Brian R. Copeland, M. Scott Taylor: w6707
This paper sets out a theory of how openness to international goods markets affects pollution concentrations. We develop a theoretical model to divide trade's impact on pollution into scale, technique, and composition effects and then examine this theory using data on sulfur dioxide concentrations when it alters the composition, and hence the pollution intensity, of national output. Our estimates of the associated technique and scale efforts created by trade imply a net reduction in pollution from these sources. Combining our estimates of scale, composition, and technique efforts yields a somewhat surprising conclusion: freer trade appears to be good for the environment.
Published: Antweiler, Werner, Brian R. Copeland and M. Scott Taylor. "Is Free Trade Good For The Environment?," American Economic Review, 2001, v91(4,Sep), 877-908. citation courtesy of