As the barriers to hemispheric trade and integration are lowered, it will be asked whether we will we hear the "giant sucking sound" of poorer nations luring U.S. and Canadian firms south to take advantage of low wages and lax environmental regulations? Or, will Latin American nations passively...

Economic theory suggests that liberalization of trade between countries with differing levels of environmental protection could lead pollution- intensive industry to concentrate in the nations where regulations are lax. This effect, often referred to as the “pollution haven” hypothesis, is...