 As discussed in 4.2, rationales of equality or equal opportunity are given for addressing economic inequalities arising within marriage through divorce law (Okin 1989, Chapters 7 and 8; Shanley 2004, 3–30, Rawls 1997, 787–794). However, divorce law does not address non-economic sources of power imbalances (such as gender role socialization) within on-going marriages, nor does it address the systemic way in which such inequalities arise. Equal opportunity seems to require changing social norms related to marriage in ways which divorce law does not. First, the gendered division of labor within ongoing marriages is costly for women (Kleingeld 1998). Second, power imbalances within marriage limit girls’ expectations and teach children to accept gendered inequality (Okin 1989, Chapter 7, Okin 1994). Third, anticipation of marriage affects women’s investment in their earning ability before marriage (Okin 1989, Chapter 7). (But for an argument that some hierarchy and inequality in marriage is just, see Landau 2012.)