While most empirical studies document that cognitive and social skills are strong predictors of individual earnings, their impact is not homogenous in space. We argue that dense urban settings utilize cognitive and social skills more intensively than rural areas, therefore the labour market...

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...