In addition to these new assumptions about the determinants and the “true” nature and motivation of preferential agreements and their supposed effects on the global trading system, the WTR is using new data and a new analysis of older data in 2011 to assess several ongoing debates on the prevalence and benefits of preferential trade. It also includes a series of interesting case studies and analytical discussions that provide information on various economic, political and legal aspects of this complex issue. This important and multidimensional contribution is an essential reading for the expert and the beginner. In this context, the spread of the ATP means that the difference between the MFN rate and the PTA rate overstates the competitive advantage of a member of the EPZ, as its competitors will increasingly benefit from preferential market access. Taking into account the preferential access of other exporters, less than 13% of preferential trade enjoys a competitive advantage of more than 2 percentage points. The result of these results is that we need to look beyond tariffs to explain why countries are taking ATPs. The central ambition of the 2011 World Trade Report is that global production networks promote deep EDPs and that these NTPs in turn strengthen these networks and the international trade flows that these networks generate. In addition, deep ASPs are generally commercially generating; they also tend to strengthen and strengthen the domestic rules enshrined in current WTO agreements. The conclusion is clear: deep integration improves the social education of the No. Similarly, the growth of deep integration requires scientists and policy makers to reconsider what is meant by “preferential trade” and to reassess whether existing theories explain the emerging patterns of ATPs. II – WTO and preferential trade agreements: from coexistence to coherence But, given the proliferation of preferential trade agreements, the advantage that a preferential tariff offers to a given exporter depends not only on the difference between the MFN tariff and the preferential rate, but also on tariffs to which competing suppliers from other countries are subject in the same market. Competition-adjusted preferential margins are calculated as a percentage of the difference between the average immigrant tariff rate for the rest of the world and the preferential rate applied to the recipient country, with weights represented by market shares in the preferential market.