1. Directors of Social Statistics, 21-22 March 2011
Proposals for Extending the Concept of Core Variables: The Example of Migration
Directors of Social Statistics, March 2011

2. Directors of Social Statistics, 21-22 March 2011
Background
Original aim: Extended analysis of micro-data
Each survey to cover a set of common variables
Harmonisation of these variables
Role within Modernisation of Social Statistics
Efficiency gains: elimination of overlap
Data integration
Directors of Social Statistics, March 2011

3. Example: Migration statistics
Current core variables
Country of birth
Country of citizenship at time of data collection
Additional relevant variables
Country of birth of parents
Country of citizenship at birth
Ever lived abroad
Year of arrival in the country of residence
Etc.
Migration Statistics Mainstreaming (ESSC, )
Review of migration-related population groups for which statistics are required
Definition of concepts
Recommendations of the priority of their inclusion in data collections
From core variables to common repository of recommended concepts and definitions
Directors of Social Statistics, March 2011

4. Extended concept of core variables
Common repository of recommended concepts and definitions
Statistical surveys
Benefit: Data integration
Cost: Possibly less appropriate definition in a specific context
Administrative data
Target concepts when translating raw data from administrative sources into harmonised statistical data
Benchmark for quality assessment of the statistical outputs from administrative data sources
In exceptional cases: guidance in the development of administrative sources for statistical purposes
Directors of Social Statistics, March 2011

5. Directors of Social Statistics, 21-22 March 2011
Discussion
Feasibility
Desirability
Priority areas apart from migration
Directors of Social Statistics, March 2011