What empirical effects of trade liberalization are? This question is debated nowadays, in both international and regional scope. This work analyzes the economic inequality among Mexican states by means of convergence methodology and spatial econometrics techniques. Results indicate a positive association between spatial autocorrelation and convergence, which is diminishing in the last years. We also estimate magnitude and direction of this relationship and we find that the lack of convergence agrees with the trade openness in the country. Spatial dependence indexes point out a consistent cluster of low incomes in the South of the country, which is worrying.