“…Collecting data on childlessness among men is even more challenging, partly because men tend to underreport their children from previous marriages and partnerships (Rendall et al 1999), and partly because they have a longer reproductive period. Thus, the only sources of data on childlessness among men are often smaller scale surveys, such as the Fertility and Family Surveys (FFS) conducted in the 1990s and the Generation and Gender Surveys (GGS) conducted since the early 2000s (e.g., Miettinen et al 2015).…”