THE VALUE OF NAFTA TO THE UNITED STATES AND CANADA: REVIEW OF THE LITERATURE The North American Free Trade Agreement (NAFTA) was signed on January 1, 1994, by Canada, Mexico, and the United States, creating a free-trade bloc in North America. [...] Because it had been in force longer than many of the other FTAs, NAFTA trade represented 92% of the net employment gains across all FTAs, 92% of the output gains, and 80% of the total U. S. goods and services export increases. [...] The lack of rules for trade in service, along with the imprecise rules of origin in the automotive industry, would necessitate a renegotiation of the deal. [...] S. trade as a whole, with Trade Partnership Worldwide31 noting that “78% of U. S. imports from Canada are raw materials, parts and components, and services used to make other goods and services in the United States.” THE PROBLEM WITH A BORDER THICKENING: INTEGRATED SUPPLY CHAINS To provide a more detailed picture of trade dependence between Ontario and the GLS8, the broad approach of the analysis [...] Lawrence National Centre for Policy and Management 19 Ontario’s Imports of Final Goods from the GLS8 Similar to Ontario’s exports of final goods to the GLS8, the province’s largest import category from the GLS8 is automobiles38 ($6.09 billion; 30% of the GLS8’s exports of vehicles).