Quarterly Labour Force Survey 2011, Quarter 2 - South Africa

Abstract
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The Quarterly Labour Force Survey (QLFS) is a household-based sample survey conducted by Statistics South Africa (Stats SA). It collects data on the labour market activities of individuals aged 15 years or older who live in South Africa.

Geographic coverage
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National coverage

Analysis unit
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Individuals

Universe
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The QLFS sample covers the non-institutional population except for those in workers' hostels. However, persons living in private dwelling units within institutions are 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 QLFS frame has been developed as a general purpose household survey frame that can be used by all other household surveys irrespective of the sample size requirement of the survey. The sample size for the QLFS is roughly 30 000 dwellings per quarter.

The sample is based on information collected during the 2001 Population Census conducted by Stats SA. In preparation for the 2001 Census, the country was divided into 80 787 enumeration areas (EAs). Stats SA's household-based surveys use a Master Sample of Primary Sampling Units (PSUs) which comprises of EAs that are drawn from across the country.

The sample is designed to be representative at the provincial level and within provinces at the metro/non-metro level. Within the metros, the sample is further distributed by geography type. The four geography types are: urban formal, urban informal, farms and tribal. This implies, for example, that within a metropolitan area the sample is representative at the different geography types that may exist within that metro.

The current sample size is 3 080 PSUs. It is divided equally into four sub-groups or panels called rotation groups. The rotation groups are designed in such a way that each of these groups has the same distribution pattern as that which is observed in the whole sample. They are numbered from one to four and these numbers also correspond to the quarters of the year in which the sample will be rotated for the particular group.

The sample for the QLFS is based on a stratified two-stage design with probability proportional to size (PPS) sampling of primary sampling units (PSUs) in the first stage, and sampling of dwelling units (DUs) with systematic sampling in the second stage.

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

{'Abstract': '摘要
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本季度劳动力调查（QLFS）是由南非统计局（Stats SA）实施的一项基于家庭的抽样调查。该调查收集了居住在南非的15岁及以上个人的劳动力市场活动数据。

地理覆盖范围
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全国范围

分析单位
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个人

调查范围
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QLFS的样本涵盖了非机构人口，但排除了工人宿舍内居住的人员。然而，居住在机构内私人住宅单位中的人员被纳入统计。例如，在学校园区内，校长住宅和教师住宿因其为私人住宅而被统计。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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QLFS的调查框架已开发为一个通用家庭调查框架，可以用于所有其他家庭调查，无论调查的样本规模要求如何。QLFS的样本规模大约为每季度30,000个住宅。

样本基于Stats SA在2001年进行的人口普查期间收集的信息。为了准备2001年的人口普查，全国被划分为80,787个统计区域（EAs）。Stats SA的家庭调查使用主样本，该样本由来自全国各地的统计区域组成。

样本旨在在省级层面以及省份内的城市/非城市层面进行代表性设计。在城市中，样本进一步按照地理类型进行分配。四种地理类型为：城市正规、城市非正规、农场和部落。这意味着，例如，在一个大都市区域内，样本代表了该大都市区域可能存在的不同地理类型。

当前样本规模为3,080个初级抽样单位（PSUs）。这些单位被平等地划分为四个子组或轮换组，称为轮换组。轮换组的设计旨在使每个组都具有与整个样本相同的分布模式。它们从一编号到四，这些数字也与样本将在其中轮换的特定组的季度相对应。

QLFS的样本基于分层两阶段设计，第一阶段采用与规模成比例的概率（PPS）抽样对初级抽样单位（PSUs）进行抽样，第二阶段采用系统抽样对住宅单位（DUs）进行抽样。

数据收集方式
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面对面 [f2f]'}