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====== Province of birth ======

In cooperation with researchers from the [[https://www.rug.nl/staff/l.viluma/|University of Groningen]] participants' place of birth has been transformed to the variable 'province of birth'. Linkage (see below) resulted in a province of birth for ~162,500 Lifelines participants, which is available in the Lifelines catalogue ([[sections]]: [[demographics]] ([[nationality & ethnicity]]) and [[secondary & linked variables]]).
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===== Calculation linked variable =====
Place of birth was obtained from the Personal Records Database Netherlands (basisregistratie personen - BRP). In the first phase of the linkage place of birth was linked to "Woonplaatsen in Nederland" (i.e. residences in the Netherlands) obtained from Statistics Netherlands (CBS) in 2011.
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After this first phase of linkage <200 places of birth couldn't be matched and have, therefore, been matched by hand. Four reasons for a mismatch have been identified
  - Name of municipality instead of place (match generated by researchers University of Groningen)
  - Blanks in name that didn't correspond with the file from Statistics Netherlands (match generated by researchers University of Groningen)
  - Former name is used (match generated by researchers University of Groningen)
  - Former municipality name is used (match generated by Lifelines)
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No province of birth has been generated if:
  * Participant was born outside of the Netherlands
  * Place of birth was matched to two provinces in the file from Statistics Netherlands

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