Aiming to verify the extent of regional differentials over the labor markets, this paper develops a comparative analyses to measure the main elements of differentiation of labor earnings between the metropolitan regions of São Paulo (RMSP) and Salvador (RMS). Taking the data from the Employment and Unemployment Research (PED) of these two metropolitan regions, we tried to estimate, through de Oaxaca decomposition, the labor income differentials resulting from different distribution of workers' productive attributes, splitting them from the differentials resulting from the regional aspects. Trying to eliminate the selectivity bias, we used the Heckman's proceduree. The results confirm the existence of an important regional differential of labor income for all group of workers analyzed, in benefit of workers of the MRSP. Such differentials of labor earnings result from the synergies associated to a larger economic concentration and conglomeration in the MRSP. Besides that, we observed a significant differential of labor earnings for the worker from the MRSP, due to the larger endowment of workers' productive attributes.
labor market; labor income differentials; productive attributes; regional differentiation
