We use longitudinal data from the National Income Dynamics Study to document the extent of recent short-term residential and household compositional change in South Africa. We analyse the demographic correlates of these transitions, including population group, age, urban/rural status, and income. We examine educational and labour-market transitions among movers and the prevalence of the four major types of compositional change -births, addition of joiners, deaths, and loss of leavers. We find that short-term household change is prevalent in South Africa. During a two-year period from 2008 to 2010, 10.5% of South Africans moved residence and 61.3% experienced change in household composition. We find that moving is more common among blacks and whites, very young children, young adults, urban individuals, and those with higher incomes. Among non-movers, compositional change is more likely for blacks and coloureds, young adults and children, females, urban individuals, and individuals with lower incomes.
This study was designed to test the efficacy of the Portable Electronic Tape Recording Automated (PETRA) scale compared to a digital scale (SOEHNLE) and diary for the collection of dietary data in a large field trial. One hundred and fifty subjects were randomly selected from the Household Valuation List, Northern Ireland, and 102 eligible subjects (aged 16-64 years) were asked to keep a seven-day dietary record. The cooperating sample (11-80) was divided into cells by sex, age and social class. PETRA and SOEHNLE scales were then randomly allocated to equal numbers of subjects within each cell. Failure to complete the seven-day record was marginally greater using the SOEHNLE scale but the effect was not statistically significant. Furthermore, there were no statistically significant differences in recorded energy and nutrient intakes between PETRA-and SOEHNLE-subjects within any sex, age or social class grouping. From questionnaire data, the PETRA system was found to surpass the traditional system in terms of 'user friendliness': but at an added cost in time spent by the field team.
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