Here's something more recent.
NAFTA's Economic Impact - Council on Foreign Relations
Council on Foreign Relations › Trade
Council on Foreign Relations
Feb 14, 2014 - ... and U.S. manufacturers
created supply chains across North America that have ... But economists still debate
NAFTA's direct impact, given the many other ... such as the movement of some
jobs and industries across borders.
[h=5]How has NAFTA affected the U.S. labor market?[/h] . . . Wide disagreement persists on how and to what degree NAFTA accounts for changes in net employment from adjustments in the labor market. Supporters of NAFTA, and many economists, see a positive impact on U.S. employment and note that new export-related jobs in the United States pay
15 to 20 percent more on average than those focused on domestic production. But side effects of the treaty should not be ignored.
Edward Alden, a senior fellow at the Council on Foreign Relations, notes that wages
haven't kept pace with labor productivity and that income inequality in the United States has risen in recent years, in part due to pressures on the U.S. manufacturing base. To some extent, he says,
trade deals have hastened the pace of these changes in that they have "reinforced the globalization of the American economy."
Opponents of NAFTA take a starker position. Thea M. Lee, the deputy chief of staff at the
AFL-CIO, which opposes NAFTA and lobbies against other free-trade agreements unless they include provisions that raise labor and environmental standards, said that NAFTA forced "workers into more direct competition with each other, while assuring them fewer rights and protections." Public Citizen, the left-leaning Washington nonprofit consumer rights organization, said in a report that the "
grand promises made by NAFTA's proponents remain unfulfilled" [PDF] twenty years after implementation and resulted in the loss of one million U.S. jobs by 2004.
But most economists say it is a stretch to blame these shifts on NAFTA. Manufacturing in the United States was under stress decades before the treaty, and job losses in that sector are viewed as part of a structural shift in the U.S. economy toward light manufacturing and high-end services. Alden says that broader economic trends affecting U.S. employment, such as China's economic rise, wouldn't be substantially altered by U.S. policy shifts toward NAFTA. . . .