Harmonizing French and German administrative data on maternal employment: A practical guide how to create comparable data sets from DADS-EDP and SIAB

This paper provides a guide how to harmonize large-scale administrative datasets from France (DADS-EDP) and Germany (SIAB) for comparative social science research. France and Germany. While both datasets offer rich, longitudinal information on individual employment trajectories which can be augmented with firm-level infor-mation, they differ in structure, sample coverage, and variable coding. Harmonizing these datasets unlocks new potential for comparative research, particularly in examining the labor market trajectories of mothers in both countries. This paper outlines the necessary steps to harmonize these data sources and gives an overview on the set of harmonized variables. The harmonized data is of significant value for researchers, providing a foundation for comparative studies on labor market outcomes in France and Germany, especially in the context of welfare state differences and their importance within the EU and worldwide. The code for harmonization is provided for further adaptation to specific research questions.