The fourth round of NAFTA talks may include firm offers in controversial topics including rules of origin, procurement of services, agricultural market access and tariff preference levels. The U.S. negotiators remain preoccupied with the trade deficit. Given that the automotive industry accounts for three quarters of the U.S. deficit with its NAFTA partners ($66 billion out of $88 billion in the past 12 months), it is arguably the most important sector to consider. Rules of origin – the proportion of a vehicle produced in the NAFTA area to be sold across the region on a tariff-free basis...