Question about secondary child care measures AHTUS

I have a question about how secondary child care is measured in the harmonized AHTUS. In the ATUS, secondary child care includes care for any child under the age of 13. In the AHTUS, secondary child care is split into categories “care of infants” and “general care of older children.” In the harmonized AHTUS that includes ATUS data, it looks like the secondary child care measures from the ATUS survey (2003 and onward) are coded only as “general care of older children.”

My question is: when harmonized, are younger children/infants taken out of the measures for secondary childcare from the ATUS survey, or does “general care of older children” include all children under age 13 for the ATUS portion of the harmonized AHTUs data?

Thank you for your help!

It can be difficult to tell which samples the AHTUS descriptions refer to. In short, secondary childcare, described as general care of older children in the ATUS portion of the harmonized AHTUs data, is identical to childcare in the ATUS and includes care for all children under age 13.

To calculate how much each person spent on secondary childcare in the AHTUS, you will need to sum TIME for cases where SEC = 34 by IDENT. If you do so however, you will notice there is more secondary childcare reported in the ATHUS than in the ATUS. This is because child sleep and wake time are used in the ATUS to determine total secondary childcare. Thus, if a child went to sleep during a main activity, secondary childcare would only be counted for the portion of the activity for which the child was awake. However, in the AHTUS harmonization process, child sleep and wake times are ignored and the secondary childcare is assumed to extend through the entire duration of the main activity.