The analysis of inequality in cities has a wide tradition, from the analysis of urban areas through factorial ecology of the Chicago School to contemporary studies on ‘urban vulnerability’. From an operative point of view, its main objective has been to elaborate a synthetic index that allows to place to the urban areas in a continuum with respect to the resources that own its residents and / or the risks that they face. This paper presents a proposal to measure the socio-economic level of urban areas and its validation. First, some basic aspect in the analysis of urban inequalities are reviewed. Then, the proposal is presented and validated, and finally, some few conclusions about the proposal and its limitations are included.
