“…For instance, research on complex ties across households draws attention to multiplepartner fertility, which has been measured using a variety of methods and data sources. Scholars have relied solely on men's fertility histories (e.g., Guzzo and Furstenberg 2007;Manlove et al 2008), have used reports of fertility histories with data from both men and women (Harknett and Knab 2007;Sinkewicz and Garfinkel 2009;Turney and Carlson 2011), and have merged administrative data on men and women (Meyer, Cancian, and Cook 2005) in order to identify fathers who have had children with multiple women. If the quality of the data on fathers varies across datasets, with some data sources being more likely than others to have identified the most disadvantaged nonresident fathers; then our estimates of other complex family behaviors, such as multiple-partner fertility, and the implications of these behaviors, will be affected as well.…”