1. Introduction : Book overview ; Overview of the ATUS [American Time Use Survey] ; Historical time use trends of mothers ; Policy implications of time use studies -- 2. A descriptive look at mothers' time use : Further description of the ATUS ; Mothers' time use on a typical day ; Time use on a typical day by the age of the youngest child ; Descriptive evidence concerning alternative caregiving measures ; Time use differences by marital status ; Time use differences by employment status ; Time use patterns of mothers compared to nonmothers ; Time use patterns of mothers compared to fathers ; The time of day pattern of caregiving time ; Summary of the descriptive look at mothers' child caregiving time -- 3. The nature of maternal caregiving: is it more like leisure or household production? : Maternal time allocation ; Data and estimation strategy ; Regression results ; Summary -- 4. Husbands' influences on mothers' unpaid time choices : Previous research on married couples' joint time use decision making ; Theoretical underpinnings and equation specification ; Mothers' nonmarket time use patterns ; Regression findings ; Conclusion -- 5. The role of nonstandard work hours in maternal caregiving : Nonstandard employment and its implications for caregiving ; Choosing caregiving minutes with a consideration for schedules ; Further descriptive statistics concerning caregiving and nonstandard employment ; Empirical model ; Determinants of weekday caregiving minutes for working mothers by work schedule ; Considering the minutes of caregiving in the peak morning and evening time slots ; Conclusions -- 6. Concluding remarks -- Appendices : A. ATUS time use categories included in five aggregate time uses ; B. The categorization of time as child caregiving according to the ATUS survey coding rules ; C. Methods used to construct price of time variables ; D. Theoretical model used in chapter 4.