Virtually all that is known about the behavior of imports rests on studies estimating income and price elasticities with postwar data. But anyone examining the evolution of trade over the last century cannot avoid asking whether the postwar period provides enough information to characterize that...

We reexamine the effect of the U.S.-Canadian border on integration of markets. The paper updates work from our earlier paper, Engel and Rogers (1996). We consider alternative measures of deviations from the law of one price. We pay special attention to the effect of the U.S.-Canada free trade...