A gender wage gap decomposition for matched employer–employee data

In this paper we evaluate the extent to which the gender wage gap in the Finnish manufacturing sector is attributable to within-job wage differentials, sex differences in individual qualifications, and disproportionate concentration of women in lower-paying firms and lower-paying jobs within firms. We use matched employer–employee data to compare wage differentials between similarly qualified female and male workers who are doing similar work for the same employer. Our modelling approach employs a correlated random effects specification to account for the hierarchical grouped structure of the underlying data.