This paper addresses the issue of the presence and the extent of equalizing differences between temporary and permanent workers. The assumption of perfect competition in the labour market is directly questioned and a simple duopsonistic model is developed with the aim of capturing the main...

A firm's decision to employ agency workers may be perceived as a replacement of directly employed workers or as way to curb union power, which trade unions would oppose. Alternatively, trade unions may encourage the (temporary) employment of agency workers in a firm, if they manage to bargain...