National Income Dynamics Study - Coronavirus Rapid Mobile Survey 2021, Wave 4 - South Africa

Abstract
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The National Income Dynamics Study - Coronavirus Rapid Mobile Survey investigates the socioeconomic impacts of the national lockdown associated with the State of Disaster declared in South Africa in March 2020, and the social and economic consequences in South Africa of the global Coronavirus pandemic. NIDS-CRAM forms part of a broader study called the Coronavirus Rapid Mobile Survey (CRAM) which aims to inform policy using rapid reliable research on income, employment and welfare in South Africa, in the context of the global Coronavirus pandemic. The study is run by researchers from the University of Stellenbosch, University of Cape Town (UCT) and University of the Witwatersrand (Wits). The NIDS-CRAM survey data collection and production operations were implemented by the Southern Africa Labour and Development Research Unit (SALDRU) at UCT. The data is collected with Computer Assisted Telephone Interviewing (CATI), with data collection repeated over several months.

Geographic coverage
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National coverage, as NIDS was only designed to be nationally representative, it is inadvisable to use the NIDS-CRAM data to calculate provincial or regional totals.

Analysis unit
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Households and individuals

Universe
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The universe of the study is South Africans 18 years old or older.

Kind of data
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Sample survey data [ssd]

Sampling procedure
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The sample frame for NIDS-CRAM is the NIDS Wave 5 CSMs and TSMs who were 18 years or older at the time of the NIDS-CRAM Wave 1 fieldwork preparation in April 2020. The sample was drawn using a stratified sampling design. No attempt was made to check whether successfully re-interviewed individuals resided in the same households as they did in Wave 5. In the survey, individuals from larger households were more likely to be sampled than individuals from smaller households.

Mode of data collection
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Computer Assisted Telephone Interview [cati]

Research instrument
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Though NIDS-CRAM is a follow-up with NIDS Wave 5 respondents, the NIDS-CRAM survey uses a much shorter questionnaire, with a focus on the Coronavirus pandemic and the national lockdown. The questionnaire was changed slightly across waves and data users should check the questionnaires for each wave when using the data.

摘要
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国家收入动态研究——冠状病毒快速移动调查旨在探究2020年3月南非宣布国家灾难状态所伴随的国家封锁的社会经济影响，以及全球冠状病毒大流行对南非社会和经济造成的后果。NIDS-CRAM是被称为冠状病毒快速移动调查（CRAM）的更广泛研究的一部分，旨在通过针对南非收入、就业和福利的快速可靠研究来为政策制定提供信息，该研究在冠状病毒全球大流行背景下进行。该研究由开普敦大学、斯坦陵布什大学和维特沃特斯兰德大学的研究人员共同执行。NIDS-CRAM的调查数据收集和生产操作由开普敦大学的南方非洲劳动与发展研究单位（SALDRU）实施。数据通过计算机辅助电话访谈（CATI）方式收集，并在数月内重复进行。
地理覆盖范围
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全国范围，鉴于NIDS旨在具有全国代表性，因此不建议使用NIDS-CRAM数据来计算省级或地区总计。
分析单元
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家庭和个人
总体
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研究的总体是18岁及以上的南非人。
数据类型
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样本调查数据 [ssd]
抽样程序
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NIDS-CRAM的抽样框架是NIDS第五波CSMs和TSMs，他们在2020年4月NIDS-CRAM第五波实地准备工作时年满18岁。抽样采用分层抽样设计。未尝试核实成功重新访谈的个人是否居住在与第五波相同的家庭中。在调查中，来自大家庭的个人比来自小家庭的个人更有可能被抽样。
数据收集方式
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计算机辅助电话访谈 [cati]
研究工具
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尽管NIDS-CRAM是对NIDS第五波受访者的后续调查，但NIDS-CRAM调查使用了一份简短的问卷，重点关注冠状病毒大流行和国家封锁。问卷在各个波次中略有变化，数据使用者在使用数据时应检查每个波次的问卷。