“…While some analyses across all groups found this U-shaped relationship, these studies were in the minority (14 of 113 associations). The studies which did find this association tended to be those that explored the variable which most accurately operationalized the hypothesis: the share of household labour between the partners (see Figure 3 for summary) (Oláh 2003;Alonso 2004;Torr and Short 2004;Schober 2013;Yoon 2014;Luppi 2016;Fukuda 2017). This is because, by looking at share, this variable captured all couple types along the curve (malebreadwinner-female-homemaker couples, dual-burdened women, and couples who share both paid and unpaid work equally).…”