Selection of the Third-Stage Sample: Listing Units Within Subareas

Projections indicated that screenings had to be completed for approximately 80,000 dwelling units in order to identify sufficient dwelling units for the national and State samples to yield Hispanic and black age-domain samples of the desired size. Assuming an average 93% screening completion rate and a projected average 84% listing unit eligibility rate implied that approximately 101,000 listings had to be selected for both study components. A listing unit was ineligible for the study if it was (a) vacant; (b) a vacation, second, or temporary home; (c) not a dwelling unit; (d) a military facility whose occupants were only military personnel; or (e) an institutional housing facility.

Dwelling unit listings were selected using systematic sampling. The sampled listings then were sent to the field for screening. After first determining that a sampled listing was eligible for the study, the interviewer completed a dwelling roster that listed all residents aged 12 or older with their age and race/ethnicity. This roster formed the basis for the within-dwelling sampling of individuals.