Skip to ContentSkip to Navigation
About usNews and EventsNews articles

Harmonization by simulation. A contribution to comparable international migration statistics in Europe

28 October 2010

PhD ceremony: Mw. B. Nowok, 13.15 uur, Academiegebouw, Broerstraat 5, Groningen

Thesis: Harmonization by simulation. A contribution to comparable international migration statistics in Europe

Promotor(s): prof. F.J. Willekens

Faculty: Spatial Sciences


International migration is a topical issue and of increasing concern to policymakers in Europe. An urgent need for reliable and comparable statistics led to a new EU regulation that obliges countries, starting from the reference year 2009, to supply migration statistics that comply with a harmonized definition. The countries may use modelling methods in order to meet these requirements. Nowoks’research contributes to a more profound understanding of the effect of definitional variations on reported migration flow figures. She establishes a comprehensive and coherent framework for the harmonization of the data by using a general notion that all migration measures are manifestations of a common underlying relocation process. The instantaneous rate of relocation represents a basis from which figures on migration can be derived according to various definitions. The focus is on the duration of stay criterion, which constitutes the main source of discrepancies in the operationalization of the migration concept in the EU Member States. In the book, simulated mobility histories of individuals are used to derive various annual migration measures for the whole virtual population. A simulation approach, which gives complete control over the counting of predefined migration events, provides valuable insights into discrepancies between the country-to-country flow data produced by origin and destination countries. The sheer complexity of an origin-destination migration dynamics model that explicitly takes account of the observational plan is discussed. An assessment of the progress that has been made towards better comparability of migration flow statistics in the EU is presented that emphasizes the potential usefulness of modelling techniques for harmonizing the available data.


Last modified:15 September 2017 3.40 p.m.
printView this page in: Nederlands

More news

  • 11 July 2019

    Major companies’ annual reports too vague about climate impact

    Many major Dutch companies publish extensive information about climate impact in their annual reports. However, very few companies provide concrete, detailed information about their own CO2 emissions, the impact of climate change on their business...

  • 08 July 2019

    UG permanently closes Yantai project

    The University of Groningen (UG) has permanently closed the project aimed at creating a branch campus in Yantai. Discussions were held with China Agricultural University, the city of Yantai and the Province of Shandong.

  • 03 July 2019

    Cheap train tickets boost public transport use but reduce customer satisfaction

    Offers of cheap single train tickets through retailers such as Kruidvat or Etos have a positive impact on the number of kilometres travelled by rail. This impact is much bigger than that of more general TV, newspaper or magazine advertising. However,...