“…Lastly, to focus on married couples, we include only mothers who were married at the time of their first birth (n = 3,963). To address the second research question, predicting marital instability (defined as separation or divorce, taken from the union formation and dissolution histories), we use discrete-time event history analyses (Allison, 1982), which is a common approach in the literature to analyzing the risk of divorce (McDaniel, Boco, & Zella, 2013;Todesco 2010). In this approach, duration drives 'exposure' to dissolution, and so we transform the data file to analyze the risk of dissolution over time.…”