Provides a comprehensive assessment of the operation and effects of the North American Free Trade Agree. (NAFTA). It includes the economic effects in aggregate and in selected manufacturing sectors and in agriculture. Also includes sections on the implementation of the NAFTA environmental (cooperation, institutions, and enforcement) and labor agreements (Mexican enforcement of labor law, the North Amer. Agree. on Labor Cooperation). Reviews the findings from a variety of outside studies and analyzes Mexican and U.S. data, attempting whenever possible to isolate the effects of NAFTA from other factors. Charts and tables.