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Validating the Immigration Policies in Comparison (IMPIC) dataset


  • Schmid, Samuel D.
  • Helbling, Marc


The aim of this paper is to discuss the external and internal validity of the newly created Immigration Policies in Comparison (IMPIC) dataset. After presenting its theoretical conceptualization, we compare the IMPIC to other datasets in this policy field. Next, using a variant of principal component analysis, we empirically analyze its sub-dimensions. Among other things, and contrary to some expectations in the extant literature, we find that there appears to be a comprehensive and consistent dimension comprising immigration policies for the fields of labor migration, family reunification, and asylum seekers. We also offer two typologies, which can be used to map the most important dimensions of variation. These validity tests allow us to better understand what the IMPIC dataset measures, what its main dimensions are, and how it can be compared to other indices that measure immigration policies.

Suggested Citation

  • Schmid, Samuel D. & Helbling, Marc, 2016. "Validating the Immigration Policies in Comparison (IMPIC) dataset," Discussion Papers, various Research Units SP VI 2016-202, WZB Berlin Social Science Center.
  • Handle: RePEc:zbw:wzbdiv:spvi2016202

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    References listed on IDEAS

    1. Klugman, Jeni & Medalho Pereira, Isabel, 2009. "Assessment of National Migration Policies: An emerging picture on admissions, treatment and enforcement in developing and developed countries," MPRA Paper 19231, University Library of Munich, Germany.
    2. Michel Beine & Anna Boucher & Brian Burgoon & Mary Crock & Justin Gest & Michael Hiscox & Patrick McGovern & Hillel Rapoport & Joep Schaper & Eiko Thielemann, 2016. "Comparing Immigration Policies: An Overview from the IMPALA Database," International Migration Review, Wiley Blackwell, vol. 50(4), pages 827-863, December.
    3. Eiko R. Thielemann, 2003. "Does Policy Matter? On Governments’ Attempts to Control Unwanted Migration," The Institute for International Integration Studies Discussion Paper Series iiisdp09, IIIS.
    4. Martin Ruhs, 2013. "The Price of Rights: Regulating International Labor Migration," Economics Books, Princeton University Press, edition 1, number 10140.
    5. Liv Bjerre & Marc Helbling & Friederike Römer & Malisa Zobel, 2015. "Conceptualizing and Measuring Immigration Policies: A Comparative Perspective," International Migration Review, Wiley Blackwell, vol. 49(3), pages 555-600, September.
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    Cited by:

    1. C. Tort`u & I. Crimaldi & F. Mealli & L. Forastiere, 2020. "Modelling Network Interference with Multi-valued Treatments: the Causal Effect of Immigration Policy on Crime Rates," Papers 2003.10525,, revised Jun 2020.
    2. Helbling, Marc & Meierrieks, Daniel, 2020. "Transnational terrorism and restrictive immigration policies," EconStor Open Access Articles, ZBW - Leibniz Information Centre for Economics, pages 564-580.
    3. Helbling, Marc & Simon, Stephan & Schmid, Samuel D., 2020. "Restricting immigration to foster migrant integration? A comparative study across 22 European countries," EconStor Open Access Articles, ZBW - Leibniz Information Centre for Economics.

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    immigration policy; open borders; internal validity; external validity; principal component analysis; index-building;

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