1. AES Anonymisation agreement
Point 6 of the agenda
Meeting of the Education and Training Statistics
Working Group Luxembourg, 8-10 October 2008
Room Quetelet

2. STATUS OF ANONYMISATION
Discussions and agreement in last TF meeting
Criteria for anonymisation
Disclosure risk test by Statistics Sweden
Further work on release of micro-data
Price of anonymised micro-data
Discussion points

3. TASK FORCE MEETING Representatives from 19 countries attended
Variables considered identifying in AES discussed
Disclosure risk tests from Statistics Sweden
Tests of cell sizes by Eurostat on AES data
Criteria for anonymisation were discussed and approved
Suggested price of micro-data.

4. SUGGESTED CRITERIA Household – all technical variables to be dropped
Month of survey – recoding into quarter of interview
Number of persons in household – aggregated into 4 age categories 0-5, 6-18, and 65 and older
Nationality – aggregated into 3 groups
Country of birth – aggregated into 3 groups
Highest level of education – regrouping of ISCED 5/6
Activity – Aggregation of NACE2D at digit 1 level
Occupation - ISCO2 at 2 digits

5. Further work on release of micro-data
Discussion and eventual approval by ETS working group
Informing the Confidentiality Committee
Contact with the participating countries for confirmation of release of their micro-data
Technical work of anonymising micro-data
Informing countries of each release of data
Release of first group of countries (17-18)
Gradual update of rest of countries

6. Price of anonymised micro-data
Price was set in accordance with Commission regulation No 831/2002 of 17 May (article 9)
Prices of similar micro-data in Eurostat were considered
Aim is to ensure a balance between reasonable levels of costs and avoiding unfair competition
Original suggested price of 500 €
Revised by Task Force, majority preferred a lower price
Agreement on 200 € for complete data set.

7. Discussion points Agreed proposal for anonymisation
Price of micro-data
Timing of release of micro-data
Approval of criteria