All industrialized countries have employment protection legislation (EPL) for permanent workers and restrictions on the use of temporary employment (RTE). The (ambiguous) effects of these on the levels of employment and unemployment have been extensively studied, but nothing is known empirically...

This paper presents the first empirical evidence on the effect of the threat of unionisation on the use of a predominantly non-union type of employment, i.e. temporary employment. The identification strategy exploits an exogenous variation in union threat induced in the UK by new legislation...