National Income Dynamics Study - Coronavirus Rapid Mobile Survey 2021, Wave 5 - 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导致的全国封锁对社会经济的影响，以及全球冠状病毒大流行对南非社会经济的后果。NIDS-CRAM作为名为冠状病毒快速移动调查（CRAM）的更广泛研究的一部分，旨在利用针对南非收入、就业和福利的快速可靠研究，为政策制定提供信息。该研究由 Stellenbosch 大学、开普敦大学（UCT）和 Wits 大学的研究人员共同执行。NIDS-CRAM 调查的数据收集和生产操作由 UCT 的南非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）收集，并在数月内重复收集。
地理覆盖范围
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全国范围，鉴于 NIDS 仅设计为全国代表性，因此不适宜使用 NIDS-CRAM 数据来计算省级或地区总计。
分析单位
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家庭和个人
总体
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研究总体包括18岁及以上的南非居民。
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 第一波现场工作准备时已满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体是否居住在与第五波相同的家庭中。在调查中，来自较大家庭的个体比来自较小家庭的个体更有可能被抽样。
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 调查使用了一份更简短的问卷，重点关注冠状病毒大流行和全国封锁。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。