Migration, Place of Work, Travel Time Sample in the 1980 PUMS
Only a subset of respondents were coded on these questions in the 1980 PUMS. MIGWT (P46) indicates whether or not the respondent is in the migration/place of work/travel time sample. Approximately, half of the respondents are included in this sample. The tables below show that the sampling fraction does not vary across geographic units:
- Sampling Fractions for the Migration, Place of work, Travel time sample by State (H4)
- Sampling Fractions for the Migration, Place of work, Travel time sample by Type of Area (H9)
- Sampling Fractions for the Migration, Place of work, Travel time sample by SMSA (H10)
If you are interested in weighting results that include these variables to population totals, use a weight of 40 (2*20) for the 5% sample and 200 (2*100) for the 1% sample.
For further information on the procedures used to draw these samples, see page 40 in the Technical documentation to the 1980 PUMS.
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