Ceglowski, Janet - Federal Reserve Bank of Philadelphia - 1998
In the late 1980s, Canada's provinces traded 20 times more with one another than with U.S. states of comparable size … and distance. In other words, the Canada-U.S. border exerted a strong effect on the pattern of Canada's continental trade … patterns. Since then, globalization and the formation of the Canada-U.S. and North American free trade areas could have reduced …