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)
Index 1- Registers in Spain 2- Census methodology 3- Linkage techniques 4- The population figure
Index 1- Registers in Spain 2- Census methodology 3- Linkage techniques 4- The population figure
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
1-Introduction (Hard work on the beginning...) Analyze administrative registers in different aspects: Upgrading Coverage Harmonization of concepts Classifications used Legal aspects Technical access
Index 1- Registers in Spain 2- Census methodology 3- Linkage techniques 4- The population figure
Index 1- Registers in Spain 2- Census methodology 3- Linkage techniques 4- The population figure
2- Census methodology Spain: 35.999 Enumeration Areas Building Census 100% 100% Enumerators with electronic devices Info from registers
2- Census methodology Spain: 35.999 Enumeration Areas Population and Dwelling Census 35.999 EAs 12% Enumerators with electronic devices Internet Paper
2- Census methodology Percentages of response among channels: 39% CAWI 43% PAPER 9% CAPI 8% Multichannel 1% Telephone
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
Index 1- Registers in Spain 2- Census methodology 3- Linkage techniques 4- Population figure
Index 1- Registers in Spain 2- Census methodology 3- Linkage techniques 4- Population figure
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: 018080340206782010619751 Sample Population register
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
Index 1- Registers in Spain 2- Census methodology 3- Linkage techniques 4- Population figure
Index 1- Registers in Spain 2- Census methodology 3- Linkage techniques 4- Population figure
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”
Population Statistics Department Questions, doubts, explanations... Contact information Jorge L. Vega Valle Population Statistics Department http://www.ine.es jorgeluis.vega.valle@ine.es