The law of survival of the political class. An analysis of the Italian parliament (1946-2010)

Drawing on Alchian's and Schumpeter's theories about the market selection of entrepreneurs and on theories of the political class, we focus on the features characterizing the Italian post-war democratic Parliament, from 1946 to 2010. We analyse the survival of the members of the Italian Parliament, taking into account all available information concerning their individual characteristics and political affiliation. We apply the stratified Cox model, taking into consideration the order of re-election of the 15,357 repeated observations (representing 7,127 members of the Italian Parliament since 1946), who are followed as if they were patients in order to study their parliamentary survival.