1. United Nations Regional Workshop on the 2010 World Programme on Population and Housing Censuses: Census Evaluation and Post Enumeration Surveys, Asunción, Paraguay, 3-7 August 2009 Adjusting Census Figures Pres. 10

2. United Nations Regional Workshop on the 2010 World Programme on Population and Housing Censuses: Census Evaluation and Post Enumeration Surveys, Asunción, Paraguay, 3-7 August 2009 Adjusting Census Figures Why adjusting census figures ? Errors may be substantial and the validity of the counts delivered by the census questioned Coverage of certain population groups may be deficient, some parts of the country may be disadvantaged in terms of financial repartition (attribution of funds, of seats…) But if the undercoverage is uniform, there is no consequences in terms of equity To have a correct estimate of the population as a basis for future intercensal estimates and projections.

3. United Nations Regional Workshop on the 2010 World Programme on Population and Housing Censuses: Census Evaluation and Post Enumeration Surveys, Asunción, Paraguay, 3-7 August 2009 Adjusting Census Figures What to adjust ? Population estimates Calculated using the census population + the evaluation from the PES Total population, population by administrative area (state, region, …) Census results Total population, population by administrative area (state, region, …) Main distributions (by state, sex, age…) All the database, in order to adjust all potential distribution

4. United Nations Regional Workshop on the 2010 World Programme on Population and Housing Censuses: Census Evaluation and Post Enumeration Surveys, Asunción, Paraguay, 3-7 August 2009 Adjusting Census Figures How adjust ? When adjusting figures or distributions: use the coverage rate corresponding to the variables Directly if available directly from the variables of the PES Using regression if not, but these estimates are not guaranteed to be consistent at regional level When adjusting the whole database, need to modify the weight of some individual records: Pb of decimal weights – use integer weights every x records Some individuals are weighted 0 and therefore removed from any tabulation

5. United Nations Regional Workshop on the 2010 World Programme on Population and Housing Censuses: Census Evaluation and Post Enumeration Surveys, Asunción, Paraguay, 3-7 August 2009 Adjusting Census Figures Some considerations Consequences of making adjustment are critical and at times politically sensitive Adjustments have an effect on demographic distributions Adjustment may be costly and time consuming (in doing and in explaining)

6. United Nations Regional Workshop on the 2010 World Programme on Population and Housing Censuses: Census Evaluation and Post Enumeration Surveys, Asunción, Paraguay, 3-7 August 2009 Summary

7. United Nations Regional Workshop on the 2010 World Programme on Population and Housing Censuses: Census Evaluation and Post Enumeration Surveys, Asunción, Paraguay, 3-7 August 2009 Summary Visión General de la Evaluación Censal y métodos seleccionados Encuestas de Post Empadronamiento Planificación de una PES Ejecución de una PES Marcos muestrales y diseño de muestra Metodologías y procedimientos para evaluar la cobertura y errores de contenido Matching Cotejando información

8. United Nations Regional Workshop on the 2010 World Programme on Population and Housing Censuses: Census Evaluation and Post Enumeration Surveys, Asunción, Paraguay, 3-7 August 2009 Summary Imputación de datos faltantes Tabulación y Sistema Dual de Estimación (SDE) Ejercicio en grupo Ajuste de la información censal Y…. Presentaciones de los países

9. United Nations Regional Workshop on the 2010 World Programme on Population and Housing Censuses: Census Evaluation and Post Enumeration Surveys, Asunción, Paraguay, 3-7 August 2009 Muchas gracias