Sample Size and Design

5,000 consumer units; each unit in sample for 5 quarters; rotation group design; quarterly interviews

60,000 households; each household in sample for 8 months over 2-year period; rotation group design; monthly interviews (income supplement once per year)

9,000 families; overrepresents low-income families; continuing panel with annual interviews

40,000 households (50,000 proposed); new panel each February (every 4 years proposed); each original sample adult in panel for 32 months (48 months proposed); interviews every 4 months

Income Data

Annual data for 12 months prior to 2nd and 5th interviews; 5 sources for individuals, 11 sources for consumer unit; major in-kind benefits

Data for prior calendar year for about 35 cash and in-kind sources

Data for prior calendar year for about 25 cash and in-kind sources with specific months received

Data for about 70 cash and in-kind sources at each 4-month wave, with monthly reporting for most sources

Tax Data

Information to determine federal, state, and local income taxes; payroll taxes; property taxes; sales taxes

None

Information to determine federal and state income taxes; payroll taxes; property taxes

Information to determine federal, state, and local income taxes; payroll taxes; property taxes