We study a prototypical model of a Parliament with two Parties or two Political
Coalitions and we show how the introduction of a variable percentage of randomly
selected independent legislators can increase the global efficiency of a Legislature,
in terms of both the number of laws passed and the average social welfare obtained.
We also analytically find an ”efficiency golden rule” which allows to fix the optimal
number of legislators to be selected at random after that regular elections have
established the relative proportion of the two Parties or Coalitions. These results
are in line with both the ancient Greek democratic system and the recent discovery
that the adoption of random strategies can improve the efficiency of hierarchical
organizations.
Un segundo artículo adaptado para España.
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