DP11712 How Large Are the Gains from Economic Integration? Theory and Evidence from U.S. Agriculture, 1880-1997

Author(s): Arnaud Costinot, Dave Donaldson
Publication Date: December 2016
Keyword(s): Gains from Economic, Ricardian Model, U.S. Agriculture
JEL(s): F1, F10, F11, F14, F15, F17
Programme Areas: International Trade and Regional Economics
Link to this Page: cepr.org/active/publications/discussion_papers/dp.php?dpno=11712

In this paper we develop a new approach to measuring the gains from economic integration based on a generalization of the Ricardian model in which heterogeneous factors of production are allocated to multiple sectors in multiple local markets based on comparative advantage. We implement this approach using data on crop markets in approximately 2,600 U.S. counties from 1880 to 1997. Central to our empirical analysis is the use of a novel agronomic data source on predicted output by crop for small spatial units. Crucially, this dataset contains information about the productivity of all units for all crops, not just those that are actually being grown - an essential input for measuring the gains from trade. Using this new approach we find substantial long-run gains from economic integration among US agricultural markets, benefits that are similar in magnitude to those due to productivity improvements over that same period.