A 2015 study showed that Mexican welfare increased by 1.31 percent as a result of NAFTA tariff cuts and Mexico`s intra-bloc trade increased by 118 percent. [63] Inequality and poverty have decreased in the regions of Mexico most affected by globalization. [75] Studies from 2013 and 2015 showed that small Mexican farmers benefited more from NAFTA than large farmers. [76] [77] In most modern economies, there are many possible coalitions of interested groups and the diversity of potential unilateral barriers. In addition, some trade barriers are created for other non-economic reasons, such as. B national security or the desire to preserve or isolate local culture from foreign influences. It is therefore not surprising that successful trade agreements are very complicated. Some common features of trade agreements are reciprocity (1), (2) a most-favoured-nation clause and (3) domestic treatment of non-tariff barriers. . . .