This paper examines the role of worker and employer characteristics in the determination of wages in the Belgian private sector. Empirical findings, based on detailed matched employer-employee data covering the period 1995-2002, reveal the existence ceteris paribus of: i) a substantial but decreasing return on education, ii) a large and stable gender wage gap, iii) an increasing wage penalty for those employed on a fixed term contract, iv) a positive and persistent employer-size wage effect, v) small and slightly declining regional wage differentials, and vi) a positive but moderate effect of company collective agreements on workers’ wages. Further results show persistent but decreasing wage differentials between workers with the same observed characteristics and working conditions, employed in different sectors. ; info:eu-repo/semantics/published