NKPS database

The Netherlands Kinship Panel Study (NKPS) database has information on over 10,000 Dutch families. Members of the four largest ethnic groups (Turks, Moroccans, Surinamese and Antillians) are over-represented in the sample.
The data come from two waves of a large-scale survey. These data are supplemented with more in-depth information from so-called 'mini panels', which are conducted among specific groups of respondents. Wave 1 was conducted 2002 - 2004, Wave 2 was conducted 2006 - 2007.

WAVE 1 DATA

The wave 1 survey data are based on three separate samples:

• The first (main sample, N = 8161) is a cross-section of individuals residing in private homes in the Netherlands, and who are at least 18 and at most 79 years old. To be eligible to participate, the sample members needed sufficient knowledge of the Dutch language. The sample frame is a national address sample.
• The second sample (migrant sample, N = 1410) consists only of members of the four largest ethnic groups (Turks, Moroccans, Surinamese and Antillians). If necessary, the interviews were conducted in their own language.
  The NKPS collaborated with the SPVA-survey (Sociale Voorzieningengebruik van Allochtonen / Social Position and Facilities Use of Ethnic Minorities) in the ethnic minorities data collection.
  The SPVA, a repeated cross-sectional survey, was organized by the Institute for Sociological and Economic Research (ISEO) in Rotterdam, and the Social and Cultural Planning Office of the Netherlands (SCP).
  The SPVA-survey was carried out in the following 13 municipalities: Amsterdam, Den Haag, Rotterdam, Utrecht, Eindhoven, Enschede, Almere, Alphen aan de Rijn, Bergen op Zoom, Hoogezand-Sappemeer, Delft, Dordrecht and Tiel.
• The third sample, the substitute sample, consists of over 1600 individuals who on earlier occasions had refused to participate in the NKPS or had not been reached. They were re-contacted in 2004 in an effort to reduce non-response. Substitute sample members filled in an abridged, self-completion version of the CAPI questionnaire. Data from family members were not collected in the non-response follow-up study.

The survey data from the 10,000 primary respondents (so-called 'Anchors') were collected by means of face-to-face interviews and self-completion questionnaires. Data from family members (so-called 'Alters') were collected as well. Self-completion questionnaires were mailed to the partner, a maximum of two randomly selected children aged 15 and over, a randomly selected parent, and a randomly selected sibling aged 15 and over. Some of the Alters resided in the same household as the Anchor, others did not. The addresses of family members were obtained from the Anchor.
In conformity with an agreement made between the NIDI and the ISEO, data collected in the context of the SPVA have been made available as well. The data are from 4199 households where the standard SPVA-questionnaires were administered and supplemented with a short NKPS-module. 1369 NKPS household head respondents (Dutch nationals) and their partners formed the SPVA control group. A short SPVA-module was administered among these respondents.
The July 2005 release of the data consists of three NKPS datafiles: the main sample, the substitute sample (also referred to as the non-response follow-up sample), and the migrant sample.

The wave 1 questionnaires are:

• CAPI questionnaire Anchor (paper version) (which was administered with the use of laptop computers)
• Self-completion questionnaire Anchor (long version)
• Self-completion questionnaire for partners
• Self-completion questionnaire for family members (parents, siblings and children)
• Self-completion substitute questionnaire Anchor
• NKPS-SPVA main questionnaire (migrant study)
• Self-completion questionnaire co-resident family members (migrant study)
• Self-completion questionnaire non co-resident family members (migrant study)

Each questionnaire has two versions: one in Dutch and one in English. Electronic versions in Turkish and Arabic of the self-completion questionnaires for non co-resident family members are also provided.

WAVE 2 DATA

In Wave 2, the data collection for the main and migrant samples was combined. The substitute sample was not included in the Wave 2 data collection. The October 2007 data release pertains to primary respondent (=Anchor) data only.

Questionnaires included in the October 2007 Wave 2 release are:

• Primary respondent(=Anchor) interview questionnaire Anchor (CAPI / CATI / CAWI)*
  
• Primary respondent self-completion questionnaire (PAPI, CAWI)*

  *)CAPI = Computer Assisted Personal Interviewing
  *)CATI = Computer Assisted Telephone Interviewing
  *)CAWI = Computer Assisted Web Interviewing
  *)PAPI = Paper And Pencil Interviewing

Download the electronic version of the NKPS Codebook and questionnaires:

  NKPS Wave 1: Codebook and questionnaires (release 21 July 2005) (CodeBookVersion_21-July_2005.zip, 1.82Mb)
  NKPS Wave 2: Codebook and questionnaires (release 1 October 2007) (CodeBookVersion_1-October_2007.zip, 0.98Mb)