Labour Force Survey 2005, 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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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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Statistics South Africa uses a rotating panel methodology for the labour force survey. The rotating panel methodology involves visiting the same dwelling units on a number of occasions (in this instance, five at most). After the panel is established, a proportion of the dwelling units is replaced each round (in this instance, 20%). New dwelling units are added to the sample to replace those that are taken out.

Enumeration Areas (EAs) that had a household count of less than twenty-five were omitted from the census 2001 frame that was used to draw the sample of Primary Sampling Units (PSUs) for the new Master Sample. Other omissions from the Master Sample frame included all institution EAs except workers, hostels, convents and monasteries. EAs from census 2001 were pooled in two stages, before and after sampling. Before sampling the criterion that was used to pool EAs was that they should contain a minimum of one hundred households. However, during listing it was discovered that there were discrepancies between the information on the database and what was on the ground.

Therefore, in the second stage of pooling, EAs that were found to have less than sixty dwelling units during listing were pooled. The Master Sample is a multi-stage stratified sample. The overall sample size of PSUs was 3000. The explicit strata were the 53 district councils/metros (DCs). The 3000 PSUs were allocated to these DCs using the power allocation method. The PSUs were then sampled using probability proportional to size principles. The measure of size used was the number of households in a PSU as calculated in the census. The sampled PSUs were listed with the dwelling unit as the listing unit. From these listings systematic samples of dwelling units per PSU were drawn. These samples of dwelling units form clusters. The size of the clusters differs depending on the specific survey requirements. The LFS uses one of the clusters that contain ten dwelling units.

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

摘要
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LFS（劳动力调查）是一项每半年轮换一次的户面板调查，旨在测量南非的就业和失业动态。该调查涵盖了与劳动力市场相关的各种问题，包括根据国际劳工组织（ILO）的标准定义的失业率（官方和扩展的失业率）。

所有版本的LFS自发布以来均已更新（一些版本更新超过一次）。这些版本变化详见DataFirst提供的文档（在“外部文档”部分，标题为“LFS 2000-2008 南非LFS汇编版注释”中）。

地理覆盖范围
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全国覆盖

分析单元
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个人

调查范围
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LFS样本涵盖了非机构人口，但排除了工人宿舍。然而，居住在机构内部私人住宅单位中的人员也被列入调查范围。例如，在学校校园内，应统计校长住宅和教师住宿，因为这些是私人住宅。然而，居住在学校校园内的宿舍学生则被排除在外。

数据类型
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样本调查数据 [ssd]

抽样程序
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南非统计局使用轮换面板方法进行劳动力调查。轮换面板方法涉及在多个场合访问相同的住宅单位（在此例中，最多五次）。在建立面板后，每轮更换一定比例的住宅单位（在此例中，20%）。为新住宅单位添加到样本中，以替换那些被移除的住宅单位。

人口普查2001框架中用于抽取一级抽样单位（PSU）样本的住宅区（EA）中，如果住宅数量少于二十五户，则被排除在外。从主样本框架中排除的其他内容包括所有非工人住宅区，如宿舍、修道院和寺院。人口普查2001的EA在两个阶段进行了合并，即在抽样前后。在抽样前，合并EA的标准是它们应包含至少一百户家庭。然而，在登记过程中发现，数据库中的信息与实地情况存在差异。

因此，在合并的第二阶段，在登记过程中发现住宅单位数量少于六十户的EA被合并。主样本是一个多阶段分层样本。PSU的总样本量为3000。明确的层是53个地区委员会/大都市（DC）。3000个PSU通过权力分配方法分配给这些DC。然后，使用规模成比例的概率原则对PSU进行抽样。所使用的规模度量是PSU中的家庭数量，这是根据人口普查计算的。从这些名录中抽取了每个PSU的住宅单位系统性样本。这些住宅单位样本形成集群。集群的大小取决于特定的调查要求。LFS使用包含十个住宅单位的其中一个集群。

数据收集方式
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面对面 [f2f]