1 / 19

Basque Statistics Office Confidentiality Project: Final stages

Basque Statistics Office Confidentiality Project: Final stages. Joint UNECE/Eurostat Work Session on Statistical Data Confidentiality Tarragona, Spain, 26-28 October 2011. Outline. Introduction Microdata for standard distribution 2.1. Background

thomasbrandon
Download Presentation

Basque Statistics Office Confidentiality Project: Final stages

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Basque Statistics Office Confidentiality Project: Final stages Joint UNECE/Eurostat Work Session on Statistical Data Confidentiality Tarragona, Spain, 26-28 October 2011

  2. Outline • Introduction • Microdata for standard distribution 2.1. Background 2.2. Methodology for the production of safe microdata 2.3. Surveys analysed • In- situ access to researchers • Future tasks • Conclusions

  3. 1. Introduction

  4. 1. Introduction

  5. 1. Introduction Period Action Output

  6. 2. Microdata for standard distribution

  7. 2.1 Backgrund • Until 2008… • Microdata distribution only under request • Few requests • Users: Universities, researchers,… • From 2008… • First microdata files for standard distribution • Social and demographic surveys (households and individuals) • Increase of requests • Users: General public • Today… • Standard microfiles in the website of EUSTAT • Request form (user identification; the objective of the request) • Business surveys: in-situ access for researchers

  8. 2.2 Methodology for the creation of microdata • Study the structure of the files: statistical unit, hierarchies,… • Selection and filter of variables • Geographical level • Identifying variables (sex, age, place of residence, civil status, profession,...). • Sensitive topics (ideology, union membership, religion, beliefs, health). • Risk analysis (Mu-Argus) • Microdata protection techniques • “Safe” microdata and metadata distribution

  9. 2.3. Surveys analysed • Survey on living conditions (ECV 2008) • Survey on demographics and validation (EDV 2009) • Survey on social capital (ECS 2010) • Survey on environment - families (EMAF 2010) • Survey on the information society - families (ESIF 2011)

  10. Survey on living conditions: creation of microdata Periodicity: five-year survey Type of survey: Sampling survey Statistical units: Families & individuals Sample size: 4.909 families (and one individual per family) Objectives and information collected: To learn about the living conditions (health, education, work, free time, environment,…) of the Basque families and population.

  11. Survey on living conditions: creation of microdata • Structure of the microfile: • one file of families • one file of individuals • a key for the join is included • Selection and filter of variables • Geographical level: quality and confidentiality criteria • Identifying variables Risk analysis

  12. Survey on living conditions: creation of microdata Risk analysis: results Families file Individuals file

  13. Survey on living conditions: creation of microdata Re-identification ratios Families file Individuals file

  14. Survey on living conditions: creation of microdata • Microdata protection techniques • Global recoding • Geographical level: Zone (groups of municipalities) • Age: Five-year groups Top-Bottom coding • Family size: Top-coded (10 or more). • Number of rooms: Top-bottom coded (1-3 rooms, …, 7 or more) Filter of sensitive variables related to: • Health, family income, economical restrictions, delinquency of the environment, participation in politics, interest in games of chance,…

  15. 3. In situ access to researchers The aim: To provide a better service to researchers by permitting access to microdata in EUSTAT facilities under a rigorous security protocol. Protocol stages • Request including information on the petitioner, objectives of the research project, people involved, detail description of the request and a work plan. • Request authorisation/rejection based on the fulfilment of the requirements and purpose of the request (“scientific purpose”). • Sign of a contract (confidentiality obligation, conditions of access,…) • Access in EUSTAT centres : Software and hardware restrictions • Check of the outputs

  16. 4. Future tasks • Continue during the 2011 and 2012 with the creation of new microdata files (Labour Force Survey, Natural Population Movement, Survey on Family Conciliation... ) • To offer in-situ access from the provincial offices in Bilbao and Donostia-San Sebastián and regard the possibility of Remote Access.

  17. 5. Conclusions • The creation of microdata requires teamwork between methodologists, experts on protection techniques, and producers of statistics. Training is needed to extend all this know-how. • The driving role of these types of transversal projects is indispensible, in our case this role is carried out by the Confidentiality Council integrated by the different departments of EUSTAT

  18. Referencias • Directive 95/46/EC of the European Parliament and of the Council of 24 October 1995 on The Protection of Individuals with regard to the Processing of Personal Data and on the Free Movement of such data. • Basque Statistics Office - EUSTAT (1999) Statistical Data Protection Techniques. Technical notebook. • Basque Statistics Office - EUSTAT (2007) Treatment of Confidentiality in EUSTAT statistical operations. Confidentiality protocol. • Garín, A., Urrutia, J., (2000). Statistical Secret protection: basic elements of a data protection system. OFISTAT Seminar. • National Institute of Statistics - INE (1994) . Population and Households Census 1991: Methodology. ISBN: 84-260-2889-6. Madrid. • Law 4/1986 of 23 April - Basque Statistical Law. • Law 15/1999 of 13 December - Organic Law on Personal Data Protection. • Statistical Programme Committee (2005) European Statistics Code of Practice and Commission Recommendations. Brussels.

  19. Thanks for your attention!

More Related