“…The family or household life‐cycle concept has a 60‐year history (Duvall, 1971; Gilly and Enis, 1982; McLeod and Ellis, 1982; Wagner and Hanna, 1983; Sobero‐Ferrer and Dardis, 1991; Schaninger and Danko, 1993; Wilkes, 1995; Gourinchas and Parker, 2002; McGregor and Bateman, 2003; Du and Kamakura, 2006; Putler et al ., 2007). The concept describes the changes of families across time, highlighting the importance of disposable time and income and the development of specific needs.…”