The rise in lone-parent households is part of the growing diversification of household types, living arrangements, and family forms that have presented in Europe over the last 40 years. In 2009 in Europe, the share of lone-parent households (calculated as the proportion of households with children under 18) ranged from 5-7% in countries like Greece, Spain, Romania, and Slovakia to 20-24% in countries like Estonia, Latvia, Ireland, and the United Kingdom (Chzhen and Bradshaw 2012, p. 490). In Switzerland, the last available survey data from 2013 indicated that 15% of households with children under 25 had one parent. More than 80% of these situations regard lone mothers (2015).1 Despite lone-parent households representing a minority of households, researchers are interested in them for two reasons. On the one hand, lone-parent households are considered at risk and are often mentioned when talking about family risks, particularly economic and health risks (Bonoli 2005). On the other hand, they are an alternative living arrangement increasingly contributing to the family diversity that characterizes contemporary families.Research on lone parents in Europe, which rests on analyses of nationally representative, large-scale surveys, has shown that lone parents are different from other parents in terms of socioeconomic and health characteristics. Lone parents have higher risks of negative outcomes (poverty, unemployment, health) than parents in couple. This is particularly true for lone mothers but less so for lone fathers. Lone