A survival analysis of the circulation of the political elites governing Italy from 1861 to 1994

We study the determinants of governments and legislatures’ survival in Italy from the unification to the end of the I Republic (1861-1994) - excluding the fascist period and the subsequent transitory institutional period, "Constituente" (1946-1948). We test whether institutional features such as electoral systems, form of State and extent of suffrage had any effect on the survival of legislatures and governments. We control for voting power of the parliamentary groups, number of parties represented in the parliament and size of the representative bodies. Unlike the political economy wisdom, we show that, over the whole period, governments and legislatures’ survivals are inversely related to the plurality electoral system. The restricted suffrage and a high voting power of the leading parties reduce the risk of anticipated end of governments. The survival of the legislatures is related to the form of state (republic) and to the voting power of the leading party.