“…Thus, we also evaluate trends in family income, conditional on employment status, and provide evidence on the extent to which increases in work have been accompanied by income gains. market time, prior research (Aguiar& Hurst, 2007;Bianchi, 2000;Bianchi, Milkie, Sayer, & Robinson, 2000;Bianchi, Robinson, &Milkie, 2006;Bianchi & Wight, 2010;Gauthier, Smeeding, &Furstenberg, 2004;Ramey & Ramey, 2010;Sayer, Bianchi, & Robinson, 2004;Zick&Bryant, 1996) suggests that mothers have at least partially protected time with children by sacrificing sleep and other leisure activities,that both employed and non-employed mothers have increased their time in primary childcare, and that resident fathers have become more involved in childcare.We explore these issues using time usedata from 1975 and 2003-2008 …”