Mancur Olson's theory of the decline of nations is path-breaking in political economics. It has been tested cross-sectionally in numerous empirical studies. We survey the existing results briefly, with a special focus on studies using the number of lobbies as an exogenous variable. Using data...

This article focuses on the role of unionized members of the parliament. Referring to the famous study by Freeman and Medoff (1984) and considering the more recent literature we first review unions' political power at the example of the US. We conclude that trade unions have not been very...