The Global Economic Intersection site has an interesting post entitled The Loss of American Manufacturing Jobs: The Reasons are not just "Unfair Labor Practices Abroad". We certainly have been losing manufacturing jobs to foreign countries for years now. This chart, from the article, makes the point:
But the article also makes the point, as the title suggests, that lower wages elsewhere is not the only reason manufacturing jobs have been lost in America. It is a more nuanced vierw of the problem.