This article focuses on identifying what are the key sectors with high potential for drag induced investment in the Mexican economy, also characterizes the sectors according to their hierarchy, impact and degree of articulation. To achieve this the input-output matrix national 2003 was used (disaggregated into 20 sectors and 79 sub-sectors), provided by the official government agency responsible for generating statistical information, which applied the traditional method of calculation of multipliers which takes into account both relations hierarchical such as circular between the productive sectors of Rasmussen (1956). The originality of the work lies in the application of the social networks theory to determine (García, Morillas and Ramos 2005, 2008): a) total effects, b) immediate effects, and c) mediative effects of sectors and thus have a full diagnosis of key sectors of the economy under study. In general, the findings indicate that for the promotion of growth and productive development, efforts should focus on manufacturing industries, which means to apply an active industrial policy.