The 9/11 terrorist attacks in New York and Washington have had profound global economic and political effects. One consequence of the tragedy is heightened security concerns surrounding the movement of goods and people across international borders that, in turn, have raised the prospects of substantial disruptions of international trade. Within the Canada-U.S. context, numerous observers have identified increased regulations and intensified inspection procedures at the Canada-U.S. border as contributing to significantly higher shipping costs and shipment delays. The higher costs and associated disruptions to commercial shipments might be inferred to discourage growth of trade between the two countries. It is now widely accepted that economic integration between the Canadian and U.S. economies is, on balance, an important contributor to the economic health of both economies, especially Canada’s. Developments that might attenuate the growth and “deepening” of North American economic integration therefore threaten the economic welfare of Canadians and Americans, and their nature and magnitude are worthy of careful analysis.
Globerman, Steven and Storer, Paul, "The Impacts of 9/11 on Canada - U.S. Trade" (2006). Border Policy Research Institute Publications. 88.