Handling of Missing Data Pres 8 United Nations

Handling of Missing Data Pres. 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

Missing Data Why are some data missed? q Refusals q Item non-response q Time constraints q Paucity of resources q Lax enumerators q Units not found q Insufficient data for matching, etc. 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

Treatment of Missing Data Two types of missing data q Unit missing data - Household non-interview q Item missing data - When some information for household or person is available and some information is not available 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

Treatment of Missing Data (contd. ) q Unit non-response - weighting as a method for compensation q No adjustment for vacant, demolished or not found q Item missing data – n Demographic characteristics - imputation to allow the production of DSE by these characteristics n Assign probabilities for unresolved o P-sample people match status or census day residence status o E-sample people enumeration status (correct or erroneous) 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

Thank You! 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