“…However, several maternal and paternal traits are positively correlated, and thus, although we relied on one parent's characteristics, we may expect that these variables also capture some information about the other parent. In particular, the resident parent's age at time of interview and her/his educational level and employment status are controlled for, following suggestions made in previous studies (Cheadle, Amato, and King 2010;Lindsey, Caldera, and Colwell 2005). Also, the time passed since the de facto separation (chosen as marking the end of the marriage, following the approach used in other Italian studies; for example, Meggiolaro and Ongaro 2008) is taken into account, because children's relationships with their non-resident parents are stronger when less time has elapsed since separation (Le Bourdais, Juby, and Marcil-Gratton 2002;Aquilino 2006).…”