Resumo

ALARCON OLGUIN, Víctor. The constituencies in Mexico, 1979-2015. Between national and state scales. Estud. polít. (Méx.) [online]. 2016, n.39, pp.149-196. ISSN 0185-1616.

The paper´s main purpose is to evaluate the general performance experienced by the model of electoral regions and the levels of party competitiveness in Mexico. This implies to make an analysis capable on estimating the evolution of electoral districts and the effective number of oppositional parties (it defined as H Min index by Juan Molinar in his contributions).Supported by these theoretical grounds, this paper will study the dynamics of the "official electoral regions" existing since 1979, in order to locate their more outstanding differences across time and their impact on the levels of representation and seats obtained by political parties. Finally, this exercise intends to propose general recommendations in order to improve -or do not- the current model of electoral apportionment, and to guarantee the levels of competitiveness in democratic conditions within the electoral regions as well.

Palavras-chave : Electoral Regions; Electoral Competitiveness; Electoral Districts; Mexican political system; Mexican Elections 1979-2015.

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