The issue of power plays a relevant role in evaluating the representativeness of a Parliament. In this paper a new governability index is introduced, taking inspiration from the propensity to disruption and referring to the power of the parties.

Voting gender gap characterises several countries, and it is likely to translate into the composition of elected assemblies and governments. Starting from given preferences of the electors, different electoral rules may translate this gap into different outcomes in terms of composition of the...