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Cape Area Panel Study 2002-2009, Waves 1-5 Secure Data

South Africa, 2002 - 2009
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Reference ID
zaf-uct-um-capssd-2002-2009-v1
Producer(s)
University of Cape Town, University of Michigan
Metadata
Documentation in PDF DDI/XML JSON
Created on
Aug 24, 2015
Last modified
Jul 28, 2020
Page views
504756
  • Study Description
  • Data Description
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  • Version
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  • Identification

    Survey ID number

    zaf-uct-um-capssd-2002-2009-v1

    Title

    Cape Area Panel Study 2002-2009

    Subtitle

    Waves 1-5 Secure Data

    Country
    Name Country code
    South Africa zaf
    Study type

    Longitudinal Survey

    Series Information

    University of Cape Town and University of Michigan . Cape Area Panel Study 2002-2009, Waves 1-5 Secure Data [dataset]. Version 1. Cape Town and Ann Arbor: University of Cape Town and University of Michigan [producers], 2015. Cape Town: DataFirst [distributor], 2015. DOI: https://doi.org/10.25828/8y6d-1153

    Abstract

    The Cape Area Panel Study (CAPS) is a longitudinal study of the lives of youths in metropolitan Cape Town, South Africa. The first wave of the study collected interviews from about 4800 randomly selected young people age 14-22 in August-December, 2002. Wave 1 also collected information on all members of these young people’s households, as well as a random sample of households that did not have members age 14-22. A third of the youth sample was re-interviewed in 2003 (Wave 2a) and the remaining two thirds were re-visited in 2004 (Wave 2b). The full youth sample was then re-interviewed in 2005 (Wave 3), 2006 (Wave 4) and 2009 (Wave 5). Wave 3 includes interviews with approximately 2000 co-resident parents of young adults, while wave 4 also includes interviews with a sample of older adults (all individuals from the original 2002 households who were born on or before 1 January 1956) and all children born to the female young adults. The fifth wave comprises all respondents interviewed in any of the Waves 2a, 3 or 4. In 2010 there were telephonic follow-ups or proxy interviewed that tried to capture those that were not successfully interviewed during the course of the 2009 fieldwork. The study covers a wide range of outcomes, including schooling, employment, health, family formation, and intergenerational support systems. CAPS began in 2002 as a collaborative project of the Population Studies Center in the Institute for Social Research at the University of Michigan and the Centre for Social Science Research at the University of Cape Town (UCT). Other units involved in subsequent waves include UCT’s Southern African Labour and Development Research Unit and the Research Program in Development Studies at Princeton University.

    The secure version of CAPS 2002-2009 includes date of birth, location (ea number, placename), job and school names and locations, as well as variables used in the processing of the data. The secure version does not include information available in the public release dataset and researchers will have to merge these data with the publicly available data when doing their analyses.

    Kind of Data

    Sample survey data [ssd]

    Unit of Analysis

    The unit of analysis for this survey is individuals.

    Version

    Version Description

    Version 1: Edited, partially anonymised data, available for use through the Secure Data Service

    Version Date

    2015-08-14

    Scope

    Notes

    The study covers a wide range of topics on youths in Metropolitan Cape Town, including schooling, employment, health, family formation, and intergenerational support systems.

    Topics
    Topic Vocabulary URI
    LABOUR AND EMPLOYMENT [3] CESSDA http://www.nesstar.org/rdf/common
    EDUCATION [6] CESSDA http://www.nesstar.org/rdf/common
    HEALTH [8] CESSDA http://www.nesstar.org/rdf/common
    HOUSING AND LAND USE PLANNING [10] CESSDA http://www.nesstar.org/rdf/common
    TRANSPORT, TRAVEL AND MOBILITY [11] CESSDA http://www.nesstar.org/rdf/common
    DEMOGRAPHY AND POPULATION [14] CESSDA http://www.nesstar.org/rdf/common
    SOCIAL WELFARE POLICY AND SYSTEMS [15] CESSDA http://www.nesstar.org/rdf/common

    Coverage

    Geographic Coverage

    The survey covered Metropolitan Cape Town.

    Geographic Unit

    The lowest level of geographic aggregation for the data is enumeration area.

    Universe

    The survey covered youths in Metropolitan Cape Town, South Africa.

    Producers and sponsors

    Primary investigators
    Name
    University of Cape Town
    University of Michigan
    Funding Agency/Sponsor
    Name Role
    Andrew W. Mellon Foundation Funder
    European Union Funder
    Fogarty International Center Funder
    Health Economics and HIV/AIDS Research Division, UKZN Funder
    National Institutes of Health Funder
    Office of AIDS Research Funder

    Sampling

    Sampling Procedure

    The CAPS household sample was drawn through a two-stage process. First, the 'enumeration areas' (EAs) used for the 1996 Population Census were divided into three strata according to whether the population of each was predominantly African, predominantly coloured or predominantly white. A sample of primary sampling units (PSUs) was selected within each stratum with probability proportional to size. Within each PSU a sample of 25 screener households was drawn. The Overview and Technical Documentation for Waves 1-2-3-4-5 provides a more detailed discussion of the sampling design. Data users should take the stratification and clustering into account for all analyses. Strata and PSUs are identified by the majpop and cluster variables respectively.

    Response Rate

    Response rates for the survey are covered in Section 5 on non-response and attrition in the document "The Cape Area Panel Study: Overview and technical documentation: Waves 1-2-3-4-5 (2002-2009)."

    Weighting

    The public release data include sample weights that should be used to adjust for the sample design. Three sample weights for wave 1 are included in the data, each of which deal with specific issues.

    The first of these weights, "weightsd", adjusts for three critical elements of the sample design: 1) the intentional oversampling of African and white households; 2) the intentional differential sampling of households with and without young adult household members; and 3) the addition of secondary households (backyard shacks) into the sample of screener households in the field. This weight is incorporated into the other two sample weights. The second, weighthr, begins from the first weight and adds additional adjustments for unit non-response at the level of PSUs. The third sample weight, weightyr, is an individual young adult weight that adds additional adjustment for individual non-response. This adjustment is made by calculating response rates for each combination of single years of age, sex, and population group (8x2x3=48 cells) using the information provided on the household questionnaire.

    In addition to the three sample design weights, the Waves 1-2-3-4-5 public release data sets include additional weights to adjust for individual young adult non-response in Waves 2, 3, 4 and 5. Since Wave 2 is composed of two sub-waves (Waves 2a & 2b) with different modules asked of different sub-samples, there are three Wave 2 attrition weights. The weight w2a_weightyr corresponds to the Wave 2a sub-sample (approximately one-third of the total CAPS Young adult sample), the weight w2b_weightyr corresponds to the Wave 2b sub-sample (approximately two-thirds of the total CAPS Young adult sample), and the weight w2y_weightyr corresponds to the combined "total" Wave 2 sample. All of these weights are individual young adult weights that add an additional adjustment for individual young adult non-response in Wave 2a, 2b or 2 "total" to the weight weightyr, which adjusts for the sample design and Wave 1 non-response.

    Similarly the weights, w3y_weightyr, w4y_weightyr and w5y_weightyr, are individual young adult weights that add additional adjustment for individual young adult non-response in Waves 3, 4 and 5 to the weight weightyr. The adjustment for Wave 2a, 2b, Wave 2 "total", Wave 3, Wave 4 or Wave 5 young adult non-response is made by estimating separate probit models of the probability the respondent completed a Wave 2a, 2b, either of the Wave 2, Wave 3, Wave 4 or Wave 5 young adult questionnaire. Information given in Wave 1 on age, sex and population group was included in the model. As in the construction of the original weight weightyr, the small number of individuals classified as Indian and other were merged with the Coloured group. From the estimation, the predicted probability was inverted and then capped at the 99% percentile to obtain the non-response adjustment.

    survey_instrument

    Questionnaires

    • Wave 1 (2002) included a household questionnaire, a young adult questionnaire and a literacy and numeracy evaluation questionnaire
    • Wave 2a (2003) and 2b (2004) both included young adult questionnaires only
    • Wave 3 (2005) included a household questionnaire, a parent questionnaire and a young adult questionnaire
    • Wave 4 (2006) included a household questionnaire, an older adult questionnaire, a young adult questionnaire, a young adult proxy questionnaire and a child questionnaire
    • Wave 5 (2009) included a young adult questionnaire, young adult telephonic questionnaire and a young adult proxy questionnaire

    The questionaires and technical documentation for use with the secure version of CAPS 2002-2009 should be downloaded from the link to the public access dataset.

    Data Collection

    Dates of Data Collection
    Start End Cycle
    2002 2002 Waves 1-5
    2003 2003 Wave 2a
    2004 2004 Wave 2b
    2005 2005 Wave 3
    2006 2006 Wave 4
    2009 2009 Waves 1-5
    2009 Wave 5

    Data Access

    Access authority
    Name Affiliation URL Email
    DataFirst University of Cape Town http://support.data1st.org support@data1st.org
    Access conditions

    Data available through our Secure Data Service

    Citation requirements

    University of Cape Town and University of Michigan . Cape Area Panel Study 2002-2009, Waves 1-5 Secure Data [dataset]. Version 1. Cape Town and Ann Arbor: University of Cape Town and University of Michigan [producers], 2015. Cape Town: DataFirst [distributor], 2015. DOI: https://doi.org/10.25828/8y6d-1153

    Contacts

    Contacts
    Name Affiliation Email URL
    DataFirst Helpdesk University of Cape Town support@data1st.org http://support.data1st.org/

    Metadata production

    DDI Document ID

    ddi-datafirst-caps-2002-2009-v1

    Producers
    Name Affiliation Role
    DataFirst University of Cape Town Metadata producer
    Date of Metadata Production

    2015-08-25

    Metadata version

    DDI Document version

    Version 2

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