1. The change of data sources in the Spanish SILC
José María Méndez
INE-Spain
London workshop on best practices for EU-SILC revision September 2015
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2. Overview - Introduction - Use of administrative data
- Future of the modes of data collection
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3. The Encuesta de Condiciones de Vida (the Spanish SILC Survey)
Introduction
The Encuesta de Condiciones de Vida (the Spanish SILC Survey)
Production of statistics on household income and living conditions.
Annual household survey. Personal interview ( households).
Growing demand for detailed information.
Need of increasing the sample size without a significant increase of the cost.
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4. New sources and new modes of data collection
Use of administrative data in the construction of income variables. Implemented in 2013.
- Improve the quality of income data.
- Reduce the respondent burden.
Use of alternative methods of data collection (CAWI, CATI). Planned.
Will be explored in a pilot test in 2016.
London workshop on best practices for EU-SILC revision

5. Use of administrative data
Addressed challenges:
Legal Issues
Technical Issues
Availability of the Personal Identification Number
Relevant income data in administrative files
The personal identification number (PIN)
The personal identification in Spain is the “NIF”, which is used in most administrative procedures.
To obtain the NIF, since the 2009 survey the data collection has been adapted.
London workshop on best practices for EU-SILC revision

6. 99% of persons are identified.
From SILC 2009 :
Some adaptations in fieldwork to collect the PIN :
Before the interview, load of data of the Population Register (selected dwellings) in the CAPI program.
During the interview, the interviewer matches the sample persons to the individuals living in the dwelling according to the Population Register.
After the interview, other procedures (automatic and manual).
99% of persons are identified.
London workshop on best practices for EU-SILC revision

7. London workshop on best practices for EU-SILC revision

8. Use of Administrative data
Need of a mixed methodology
We had the following problems:
- Geographic coverage (Basque Country).
- Income recipient’s coverage (domestic personnel, informal economy, etc).
- Identification of income type.
London workshop on best practices for EU-SILC revision

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11. Questionnaires Administrative data Final microdata
London workshop on best practices for EU-SILC revision

12. New Methodology. Income components
Outline of the new methodology
New Methodology. Income components
Ideal situation
Administrative files
Field 1
Field 2
Field 3
Field 4
Field 5
...
Question 1
Question 2
Question 3
Question 4
Question 5
...
Questionnaire
Component 1
Component 2
Component 3
Component 4
Component 5
...
Target variables
London workshop on best practices for EU-SILC revision

13. New methodology. Income components. Real Situation
...
Target variables
Question 1
Question 2
Question 3
Question 4
Question 5
Question 6
Question 7
Question 8
...
Questionnaire
Administrative data
Field 1
Field 2
Field 3
Field 4
Field 5
Field 6
Field 7
...
Partially
In most cases the construction is direct, but we may find complex situations
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14. Construction of income components Source of the values:
Administrative data : -----
Questionnaire: .....
Comp. 1
----
Comp. 2
Comp. 3
Comp. 4
Comp. 5
Comp. 6
----
When the situation is uncertain, the information from questionnaires is used (although aggregated administrative data are used in the data checking)
Group of target variables
London workshop on best practices for EU-SILC revision

15. Impact of the use of administrative records on indicators
SILC Distribution of the equivalised income
(new and old methodology) 70 60 50 40 30 20 10
-5000
15000
35000
55000
75000
95000
-10
Old method.
New method.
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23. Future of the modes of data collection
New demands in the production of indicators.
The new methodology based in the use of administrative data makes possible the use of a shorter questionnaire.
Opportunities to implement alternative modes of data collection (CAWI, CATI).
Significant increase of the sample size without an excessive increase in the cost of the operation.
London workshop on best practices for EU-SILC revision

24. -Change of the methodology in data collection.
Challenges:
-Change of the methodology in data collection.
-Collection of a household questionnaire and individual questionnaires for all adults.
-Panel component (dynamic of the household composition).
London workshop on best practices for EU-SILC revision

25. Pilot test for Use of a generic system (named IRIA) developed in INE-Spain for multimode data collection.
London workshop on best practices for EU-SILC revision

26. THANK YOU FOR YOUR ATTENTION!
José María Méndez
London workshop on best practices for EU-SILC revision