BIK (code)

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The BIK regions and interlinked areas are a nationwide spatial classification system that represents the city-surrounding area relationships at the municipal level for metropolitan areas, urban regions, central and sub-centers. The name “BIK” goes back to the institute “BIK Aschpurwis + Behrens GmbH” in Hamburg.

A BIK region includes all municipalities whose commuter priority is directed to a common core city. The commuter quota and commuter priority are calculated using a link between commuter data from the Federal Employment Agency (employees subject to social insurance contributions by place of residence and place of work) and the current population update from the state statistical offices (population at the place of main residence in the municipalities).

If at least 7% of the resident population commute to a core city as employees subject to social security contributions, this is the preferred commuter destination of the municipality (commuter priority). In addition, various minimum sizes for core cities and regions as well as statistical methods are included in the calculation in order to adequately take into account large individual cities without a sufficient flow of commuters as well as sub-centers within larger integrated areas. The BIK regions have been created since 1991 by the private regional and market research institute BIK Aschpurwis + Behrens GmbH. In addition to numerous applications in sociological, economic and geographical projects (. Eg socio-economic Panel SOEP ) BIK regions also by the Federal Statistical Office used for non-administrative territorial organization and provide an important basis for the ADM areal system for stratification of sampling the German market - and social research institutes.

According to the size of the population in the BIK region, they are divided into four types of region:

  1. Metropolitan areas are large, densely populated agglomerations in which the core cities and their surrounding areas have at least 750,000 inhabitants.
  2. Urban regions are larger densely populated areas with at least 100,000 inhabitants (core city and surrounding communities).
  3. Middle-center areas are interdependent areas of the core city and the surrounding area with a total of between 25,000 and 100,000 inhabitants.
  4. Sub-center areas are small integrated areas with 6,000 to 25,000 inhabitants.
  5. No BIK region : This includes municipalities that do not belong to any BIK region because they do not have a sufficiently high target commuter rate to a core municipality (approx. One third of all municipalities - 31%).

See also

Individual evidence

  1. ↑ BIK Aschpurwis + Behrens GmbH . BIK Aschpurwis + Behrens GmbH, Hamburg. Retrieved March 7, 2014.
  2. ↑ Archive link ( Memento of the original from December 5, 2010 in the Internet Archive ) Info: The archive link was automatically inserted and not yet checked. Please check the original and archive link according to the instructions and then remove this notice. Retrieved February 8, 2011.  @1@ 2Template: Webachiv / IABot / www.destatis.de

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