We test for the signalling hypothesis versus human capital theory using the Wiles test (1974) in a country which has experienced a dramatic increase in the supply of skills. For this purpose, we construct a job match index based on the usefulness of the school-provided skills and the relevance...

Purpose: This paper tries to identify the wage gap between informal and formal workers and tests for the two-tier structure of the informal labour market in Poland. Design/methodology/approach: I employ the propensity score matching (PSM) technique and use data from the Polish Labour Force...