 The NAALC supplement to NAFTA aimed to create a foundation for cooperation among the three members for the resolution of labor problems, as well as to promote greater cooperation among trade unions and social organizations in all three countries, in order to fight for the improvement of labor conditions.Though most economists agree that it is difficult to assess the direct impact of the NAALC, it is agreed that there has been a convergence of labor standards in North America.Given its limitations, however, NAALC has not produced (and in fact was not intended to achieve) convergence in employment, productivity and salary trend in North America.