Imputing Consumption – Concepts and Simplified Example

Gretchen DonehowerDay 3, Session 1, NTA Time Use and Gender Workshop

Wednesday, May 23, 2012Institute for Labor, Science and Social Affairs (ILSSA)

Hanoi, Vietnam

Outline

1. Review production2. Concepts involved in imputing consumption– Consumption estimation strategy– Imputation assumptions

3. Work through spreadsheet example of simplified time use dataset (computing production and consumption)

Production Review

• See summary document on wiki

Consumption Estimation Strategy• A Time Use Survey is:– A sample of time producers and types of activities they

produce• A Time Use Survey is NOT:– A sample of all time produced in a household– A sample of time consumers and what they consumed

• So what do we do to estimate consumption?– Impute consumption to producer’s household members and

the general population by age and sex– Multiply by number of producers in the population by age and

sex to get aggregate age-sex matrix– Divide by number of consumers to get consumption profile by

age and sex

Consumption Imputation Assumptions

• For care activities– If care is for household members, divide equally

among all household members in target age range• Example: for care of household children aged 0-18, divide

time equally among all household members age 0-18

– If care is for non-household members, divide equally among general population in target age range• Example: for volunteering, divide time equally among

total population

• For general household activities– Divide equally among all household members

Lab Session

• Finish time production age profiles in time units and money units

• Be ready to share some plots at the end of the session

• Work through simplified spreadsheet example of consumption

• If there is time, start thinking about how to implement consumption calculation strategy with your time use data