Gender pay gap trends across STEM fields: an empirical analysis

Purpose This paper analyses the gender pay gap (GPG) in science, technology, engineering, and mathematics (STEM) in Portugal over the past decade, utilising official national earnings data. Design/methodology/approach A decomposition method is applied to estimate the explained and unexplained components of the GPG both at the mean and across the distribution quartiles of national earnings. This methodology can also be applied to other sectors or countries, providing robust statistical and econometric results relating to the GPG. Findings The results show that the GPG varies heterogeneously across STEM fields. In occupations relating to Information and Communication Technologies (ICT), which are included in STEM, the GPG has been widening in recent years, in contrast to the overall trend in the labour force. Originality/value The GPG in STEM is under-researched, with existing literature indicating a structural gap in these occupations. Understanding this GPG is essential for its reduction and for maximising human capital, which is vital for social and economic growth. This article aims to contribute to the discussion on this topic and offers potential policy recommendations.