“…While the central role of the presence of a sexual partner for childbearing is often obvious to lay people, demographic studies on fertility tend to examine fertility and union formation and duration dynamics separately, not least due to the theoretical and methodological complexities that integrating multiple life-course processes entails (Matysiak & Nitsche, 2016). Complicating this picture is variation in structural, economic, and/or cultural linkages between union formation and childbearing processes.…”