Labour Force Survey 2007, 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是一项每半年进行一次的轮换样本家庭调查，旨在精确衡量南非的就业与失业动态。该调查涵盖了与劳动力市场相关的诸多议题，包括官方和扩展定义下的失业率（根据国际劳工组织（ILO）的标准定义）。

自发布以来，LFS的所有版本均已更新（其中一些版本更新超过一次）。这些版本变更的详细信息可在DataFirst提供的文档中查阅（在“外部文档”部分，标题为“2000-2008年南非LFS综合版注释”）。

地理覆盖范围
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全国覆盖

分析单元
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个人

总体
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LFS样本涵盖了非机构人口，但不包括工人宿舍。然而，居住在机构内部私人住宅单位的人士也被纳入统计。例如，在学校园区内，校长住宅和教师宿舍因其为私人住宅而被计入。然而，居住在学校园区宿舍的学生则被排除在外。

数据类型
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样本调查数据 [ssd]

抽样程序
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南非统计局采用轮换样本方法进行劳动力调查。轮换样本方法涉及多次访问相同的住宅单位（在本例中最多五次）。在样本组建立之后，每轮都会替换一定比例的住宅单位（在本例中为20%）。新住宅单位被添加到样本中，以替换那些被移除的单位。

人口普查2001框架中，对于家庭数量少于二十五户的普查区域（EAs）被排除在用于抽取新主样本的基本抽样单位（PSUs）的样本之外。主样本框架的其他排除项包括所有非工人、宿舍、修道院和僧侣的机构EAs。2001年的人口普查区域在两个阶段进行了合并，分别在抽样之前和之后。在抽样之前，合并EAs的标准是它们应至少包含一百户家庭。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EAs被合并。主样本是多阶段分层样本。PSUs的总体样本量为3000。明确的层包括53个地区委员会/大都市（DCs）。3000个PSUs根据权重分配方法分配给这些DCs。然后，使用与规模成比例的概率原则对PSUs进行抽样。所使用的规模衡量标准是PSU中的家庭数量，该数量是根据人口普查计算的。从这些列表中抽取了每个PSU的住宅单位系统样本。这些住宅单位的样本形成簇。簇的大小取决于具体的调查要求。LFS使用包含十个住宅单位的簇之一。

数据收集方式
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面对面 [f2f]