Changing Rhythms of American Family Life. Suzanne M. Bianchi, John P. Robinson, & Melissa A. Milkie. New York: Russell Sage Foundation. 2006. 249 pp. ISBN 0-87154-136-X. $37.50 (hardcover). As Suzanne M. Bianchi, John P. Robinson, and Melissa A. Milkie note in Changing Rhythms of American Family Life, concerns about the expansion of women's participation in the paid labor market are often tied to expectations that women's increased participation in the workforce has led to a decrease in parental involvement in children's lives. Additionally, sociological research on this issue suggests that women's participation in the labor market has led them to work an additional shift: one in the paid workforce and other in their home. Bianchi, Robinson, and Milkie set out to test these expectations using time-diary data and their results are often surprising. The authors rely on multiple national U.S. time-diary studies dating from 1965, which asked respondents to record a 24-hour period of time use. Additionally, the authors collected their own data, The National Survey of Parents, in 2000 and 2001, of 1,200 parents living with children younger than 18 years. On the basis of this research, the authors make three central claims. First, the authors convincingly argue that despite increased workforce participation, today's mothers are spending as much, and in some cases, more time with their children than in 1965. In 2000,78% of mothers worked in the paid labor market in comparison to 45% in 1965, but they are spending similar amounts of time with their children as their predecessors did. Having discovered that women's increased labor force participation has not significantly decreased their time with children, the authors ask from where the additional time comes. They find that some women manage the balance between work and family by cutting down on working hours when children are young or by working part time. Significantly, the authors find that the time is not taken from sleep or from leisure, two more obvious areas of trade-off. Instead, women have dramatically cut back on the numbers of hours that they spend doing housework. Additionally, Bianchi et al. find that women are spending an increasing amount of time multitasking, which they define as time spent doing at least two activities at once. The authors also find that there have been significant changes in fathers' lives over the past 40 years. Fathers do more work in the home than they did in the past, while continuing to spend considerable amounts of time in the paid labor market. In contrast to earlier findings, which suggest that fathers' participation in the home is limited to the fun aspects of child care, Bianchi et al. …