Using data from 15 countries, this team of researchers argues that (contra some earlier findings): “both within-job differences and sorting into jobs make substantial contributions to gender pay gaps” but the within-job differences are on the decline.

https://www.nature.com/articles/s41562-022-01470-z

Within-job gender pay inequality in 15 countries - Nature Human Behaviour

Using data from 15 countries, Penner et al. find that women earn less than men who are working for the same employer in the same occupation. These results highlight the continued importance of equal pay for equal work.

Nature