He is the Ragnar Nurkse Professor of Economics at Columbia University.
He taught at Harvard University before joining Columbia's faculty in 1999 and was appointed chair of the economics department in 2001.
[2] Davis' research focuses on testing international trade theories and his theoretical contributions include improving the Heckscher–Ohlin model by relaxing assumptions underlying factor price equalization to generate high predictive success using the model to forecast international trade.
[3] His research scholarship has focused on economic geography and the inequality within cities.
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