1. Expert Group Meeting on Censuses Using Registers Geneva, 22nd May 2012
A general approach to the importance and use of registers in the Spainsh Census
Expert Group Meeting on Censuses Using Registers
Geneva, 22nd May 2012
Jorge L. Vega Valle
Population Statistics Department
National Statistics Institute (Spain)

2. Index 1- Registers in Spain 2- Census methodology
3- Linkage techniques
4- The population figure

3. Index 1- Registers in Spain 2- Census methodology
3- Linkage techniques
4- The population figure

4. 1-Introduction Padron (Population Register) + 2001 Census Cadaster
National Identity Cards and Resident Cards (Home Office)
Vital Statistics Bulletins
Social Security
Tax Agency
Consumption of electricity
Educational attainment
Unemployment national agency

5. 1-Introduction (Hard work on the beginning...)
Analyze administrative registers in different aspects:
Upgrading
Coverage
Harmonization of concepts
Classifications used
Legal aspects
Technical access

6. Index 1- Registers in Spain 2- Census methodology
3- Linkage techniques
4- The population figure

7. Index 1- Registers in Spain 2- Census methodology
3- Linkage techniques
4- The population figure

8. 2- Census methodology Spain: 35.999 Enumeration Areas Building Census
100%
100%
Enumerators with electronic devices
Info from registers

9. 2- Census methodology Spain: 35.999 Enumeration Areas
Population and Dwelling Census
EAs
12%
Enumerators with
electronic devices
Internet
Paper

10. 2- Census methodology Percentages of response among channels: 39% CAWI
43% PAPER
9% CAPI
8% Multichannel
1% Telephone

11. 2- Census methodology Advantages Disadvantages
- Easier to find and more qualified staff
- Multichannel approach
- Increase of quality
- Colection of building coordinates
- Budget reduction
Disadvantages
- Detailed request at low geographical level
- First time

12. Index 1- Registers in Spain 2- Census methodology
3- Linkage techniques
4- Population figure

13. Index 1- Registers in Spain 2- Census methodology
3- Linkage techniques
4- Population figure

14. 3- Linkage techniques Technique Nº 1: Supercode (objective)
-NAME: Pedro (01808)
-SURNAME1: López (03402)
-SURNAME2: García (06782)
-DAY OF BIRTH: (01)
-MONTH OF BIRTH : June (06)
-YEAR OF BIRTH : (1975)
-SEX: Male (1)
Code:
Sample
Population register

15. 3- Linkage techniques Technique Nº 2: _CONF topics (subjective) -NAME:
-SURNAME:
-DATE OF BIRTH
-PLACE OF BIRTH:
-SEX:
Linkage:
-Number of ‘C’=5
-Number of ‘C’=4 and Number of ‘P’=1
-Number of ‘C’=3 and Number of ‘P’=2
-Number of ‘C’=4 and SEXO_CONF=‘D’ or ‘I’
-Non comparable (I)
-Equal (C)
-Similar (P)
-Distinct (D)
Sample
Population
register

16. Index 1- Registers in Spain 2- Census methodology
3- Linkage techniques
4- Population figure

17. Index 1- Registers in Spain 2- Census methodology
3- Linkage techniques
4- Population figure

18. 4- Population figure PreCensus file. Each person has a factor of...
“1” if no doubts about counting
“0” if no doubts about non counting
“x” if doubts about counting
How do we calculate “x”?
All registers with “x” and similar features will be agregated in clusters.
Xcluster= (1-2) / 3
(1)=Estimated size cluster
(2)= Records in cluster with CF of “1”
(3)= Records in cluster with CF of “x”

19. Population Statistics Department
Questions, doubts,
explanations...
Contact information
Jorge L. Vega Valle
Population Statistics Department