Labour Force Survey 2003, September - South Africa

Abstract
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The LFS is a twice-yearly rotating panel household survey, specifically designed to measure the dynamics of employment and unemployment in South Africa. It measures a variety of issues related to the labour market,including unemployment rates (official and expanded), according to standard definitions of the International Labour Organisation (ILO).

All editions of the LFS have been updated (some more than once) since their release. These version changes are detailed in a document available from DataFirst (in the "external documents" section titled "LFS 2000-2008 Collated Version Notes on the South African LFS").

Geographic coverage
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National Coverage

Analysis unit
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Households (dwellings) and individuals

Universe
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The LFS sample covers the non-institutional population except for workers' hostels. However, persons living in private dwelling units within institutions are also enumerated. For example, within a school compound, one would enumerate the schoolmaster's house and teachers' accommodation because these are private dwellings. Students living in a dormitory on the school compound would, however, be excluded.

Kind of data
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Sample survey data [ssd]

Sampling procedure
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The LFS is a twice-yearly rotating panel household survey. A rotating panel sample involves visiting the same dwelling units on a number of occasions (in this instance, five at most), and replacing a proportion of these dwelling units each round. New
dwelling units are added to the sample to replace those that are taken out. The pilot round of LFS fieldwork took place in February 2000, based on a probability sample of 10 000 dwelling units. This survey took place six months later, using a larger probability sample of 30,000 dwelling units. Among the 10,000 households visited in February, approximately 40% were re-visited in September 2000. The fieldworkers had some difficulty in identifying certain dwelling units in the sample, particularly in those areas where there are no addresses.

The Master Sample is based on the 1996 Population Census of enumeration areas (EA) and the estimated number of dwelling units from the 1996 Population Census. All 3000 PSUs included in the Master Sample were used in the Labour Force Survey. A PSU is either one EA or several EAs when the number of dwelling units in the base or originally selected EA was found to have less than 100 dwelling units. Each EA had to have approximately 150 dwelling units but it was discovered that many contained less. Thus, in some cases, it has been found necessary to add EAs to the original (census) EA to ensure that the minimum requirement of 100 dwellings, in the first stage of forming the PSUs, was met. The size of the PSUs in the Master Sample varied from 100 to 2445 dwelling units. Special dwellings such as prisons, hospitals, boarding houses, hotels, guest houses (whether catering or self-catering), schools and churches were excluded from the sample.

Explicit stratification of the PSUs was done by province and area type (urban/rural). Within each explicit stratum, the PSUs were implicitly stratified by District Council, Magisterial District and, within the magisterial district, by average household income (for formal urban areas and hostels) or EA. The allocated number of EAs was systematically selected with "probability proportional to size" in each stratum. Once the PSUs included in the sample were known, their boundaries had to be identified on the ground. After boundary identification, the next stage was to list accurately all the dwelling units in the PSUs.

The second stage of the sample selection was to draw from the dwelling units listing whereby a systematic sample of 10 dwelling units was drawn from each PSU. As a result, approximately 30,000 households (units) were interviewed. However, if there was growth of more than 20% in a PSU, then the sample size was increased systematically according to the proportion of growth in the PSU.

Mode of data collection
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Face-to-face [f2f]

{'Abstract': '本《劳动力调查》系一种每半年进行一次的轮换式家庭住户调查，旨在精确衡量南非就业与失业的动态变化。调查内容涵盖劳动市场的诸多问题，包括失业率（官方与扩展定义），均依据国际劳工组织（ILO）的标准定义进行衡量。', 'Geographic_coverage': '全国范围', 'Analysis_unit': '住户（住宅）及个人', 'Universe': '《劳动力调查》样本涵盖非机构化人口，除工人宿舍外。然而，居住在机构内部私人住宅单位的人员亦在统计范围内。例如，在学校园区内，校长的住宅和教师宿舍因其为私人住宅而被纳入统计。但居住在学校园区宿舍的学生则不包括在内。', 'Kind_of_data': '样本调查数据 [ssd]', 'Sampling_procedure': '《劳动力调查》是一项每半年进行的轮换式家庭住户调查。轮换式样本涉及在多个场合访问相同的住宅单位（在本例中最多五次），并在每一轮中替换一部分住宅单位。新的住宅单位被添加到样本中以替换那些被移除的单位。LFS的试点调查于2000年2月进行，基于10,000个住宅单位的概率样本。六个月后，进行了一次调查，使用了更大规模的30,000个住宅单位的概率样本。在2月份访问的10,000户家庭中，大约40%在2000年9月被再次访问。调查员在识别某些样本中的住宅单位时遇到一些困难，尤其是在那些没有地址的地区。', 'Mode_of_data_collection': '面对面 [f2f]'}