The article tries to answer an old question of economic theory and institutional economics: How do trade unions fit into a market economy? Are they a constitutive element of the market order or: are they a source of irritation and disruption?

A large number of articles have analysed 'the one constant' in the economic effects of trade unions, namely that collective bargaining reduces employment growth by two to four percentage points per year. Evidence is, however, mostly related to Anglo-Saxon countries. We investigate whether a...

Empirical evidence suggests that the bargaining power of trade unions differs across firms and sectors. Standard models of unionization ignore this pattern by assuming a uniform bargaining strength. In this paper, we incorporate union heterogeneity into a Melitz (2003) type model. Union...