Integration components of the national census system

The new census can only exploit its full potential if it takes the form of a well-functioning integrated system. In order to create an integrated system, integration components are needed which will bring together surveys based on different data sources. Collectively used basic populations, the new AHV/AVS number, the Buildings and Dwellings Identifier (EGID/EWID) and key variables fulfil this function.

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https://www.bfs.admin.ch/content/bfs/en/home/statistics/population/surveys/census/natonal-census-integrated-system/integration-components-national-census-system.html