1. Context variables in time use surveys Michael Bittman 13 June 2012, UNSD, EGM on ICATUS

2. Elements of time use survey 1.Background questionnaire (including household form) Provides key information on o household (composition etc.), o respondents (demographics, labour force status) and o some other crucial variables (health conditions, care-givers flag, non-parental childcare, outsourced household services)

3. Hours per week housework Husbands share of couples income

4. Elements of time use survey 1.Background questionnaire (including household form) Provides key information on o household (composition etc.), o respondents (demographics, labour force status) and o some other crucial variables (health conditions, care-givers flag, non-parental childcare, outsourced household services)

5. Elements of time use survey…2 2. Time diary or best substitute o Ideally start, finish times of primary and secondary activities o Some question about the kind of day the diary day was o Often some global questions about time pressure or the reverse o and some information about context of activities, typically *where activity took place *If in motion, mode of transport *company present when activity took place (includes alone) *For whom activity was undertaken *Whether paid or not *Whether ICT device used during this activity

6. Trends in walking USA 1965-2003 Table 2 Prevalence*of walking behaviours, sports and exercise, and total physical activity Proportion of doers 1965197519851992–19942003 (N = 1651)(N = 1555)(N = 2923)(N = 7527)(N = 19714) Physical activity variable nnnnn %%% (95% CI) Any walking395744315773720 2.43.715.221.018.9 (1.6; 3.1)(2.7; 4.6)(13.9; 16.5)(20.0; 21.9)(18.3; 19.4) Walking for exercise395785NA1073 2.43.72.95.4 (1.6; 3.1)(2.7; 4.6)(2.3; 3.5)(5.1; 5.8) Walking for transportNA 10512442845 3.616.514.4 (2.9; 4.3)(15.7; 17.4)(13.9; 14.9) Walking the dogNA 275408506 9.45.42.6 (8.3; 10.5)(4.9; 5.9)(2.3; 2.8) Sports/exercise**9718850114382427 5.912.117.119.112.3 (4.7; 7.0)(10.5; 13.7)(15.8; 18.5)(18.2; 20.0)(11.9; 12.8) Total physical activity*** 13423785026025540 8.115.229.134.628.1 (6.8; 9.4)(13.5; 17.0)(27.4; 30.7)(33.5; 35.6)(27.5; 28.7) NA = data not available; *Prevalence estimates age-standardized to the 2000 US. census population using age groups 18–24 years, 25–34 years, 35–44 years, 45–64 years, and 65 years or older; **walking for exercise not included, with the exception of 1992–1994 which might have contained walking for exercise; ***all walking and sports/exercise considered, no double-counting

7. Mobile phone use from context variable in 2007 Time Diary

8. Some difficulties measuring elder care ABS data had care-giver flag, with tough eligibility criteria Yet mean time spent in caring for adults very low, much lower that expected from other sources Problem of non-self-identifying care-givers However, care-giver had a distinctively high domestic labour times – i.e. long in cooking, laundry and cleaning than comparable non- care-givers Issues with joint production? A care-givers time signature, can be used to revise estimate and reach hidden carers