United Nations Workshop on the 2010 World Programme on Population and Housing Censuses: Census Evaluation and Post Enumeration Surveys, Amman, Jordan, November, 2010 Methodologies and Procedures for Evaluating Coverage and Content Error Pres. 6

United Nations Workshop on the 2010 World Programme on Population and Housing Censuses: Census Evaluation and Post Enumeration Surveys, Amman, Jordan, November, 2010 Methodologies & Procedures for Evaluation  PES basically involves two overlapping P (for Population) - and E (for Enumeration, ie from the census) - samples  P sample areas disclosed only need to know basis  P and E samples data collection occurs at different times  Mover procedures A, B, & C

United Nations Workshop on the 2010 World Programme on Population and Housing Censuses: Census Evaluation and Post Enumeration Surveys, Amman, Jordan, November, 2010 What is a P sample?  The Population sample (P) is the sample of clusters (EAs) taken from the same target population but independent from the census  Independently listed housing units that are valid and unique  Results used to estimate census omissions

United Nations Workshop on the 2010 World Programme on Population and Housing Censuses: Census Evaluation and Post Enumeration Surveys, Amman, Jordan, November, 2010 What is an E sample?  The E sample is a sample drawn from cases already enumerated in the census  Housing units enumerated in the census in the same sample area as the P-sample  It is common to have an overlap of the E and P samples  Results used to estimate census erroneous inclusions  Estimate of erroneous inclusions provides a correction factor used in the Dual System Estimate of True Population

United Nations Workshop on the 2010 World Programme on Population and Housing Censuses: Census Evaluation and Post Enumeration Surveys, Amman, Jordan, November, 2010 Some definitions  Non-movers: persons who were in a particular household as of the census and PES date  Out-movers: persons who were in a particular household at the census date but moved out or were not part of the household at the time of the PES  In-movers: Persons who were enumerated in a particular household during the PES but where not there during the census date

United Nations Workshop on the 2010 World Programme on Population and Housing Censuses: Census Evaluation and Post Enumeration Surveys, Amman, Jordan, November, 2010 Census datePES date Zainab Mahmoud Fathi Zainab Mahmoud Nadia Fathi

United Nations Workshop on the 2010 World Programme on Population and Housing Censuses: Census Evaluation and Post Enumeration Surveys, Amman, Jordan, November, 2010 Census datePES date Zainab Mahmoud Fathi Zainab Mahmoud Nadia Fathi Non movers In mover Out mover

United Nations Workshop on the 2010 World Programme on Population and Housing Censuses: Census Evaluation and Post Enumeration Surveys, Amman, Jordan, November, 2010 Measuring Omissions & Erroneous Counts Procedure A  Constructs household as they existed at the time of the census for sample address  Respondents asked to identify all persons in sample households on census date  Persons are subsequently matched against names, addresses or locations on census records  Estimates are then made of numbers and percent of matched non-movers and out-movers

United Nations Workshop on the 2010 World Programme on Population and Housing Censuses: Census Evaluation and Post Enumeration Surveys, Amman, Jordan, November, 2010 Census date Procedure A PES date Zainab Mahmoud Fathi Zainab Mahmoud Nadia Fathi Zainab Mahmoud …Fathi Zainab Mahmoud …Fathi

United Nations Workshop on the 2010 World Programme on Population and Housing Censuses: Census Evaluation and Post Enumeration Surveys, Amman, Jordan, November, 2010 Measuring Omissions & Erroneous Counts (contd.) Procedure B  Identified census day addresses for all household members living at sample address at the time of PES  Respondent asked to provide address(es) or location(s) where they were on census date  Then matched against names on corresponding census questionnaires  Estimates of number and per cent matched for non- movers and in-movers are calculated

United Nations Workshop on the 2010 World Programme on Population and Housing Censuses: Census Evaluation and Post Enumeration Surveys, Amman, Jordan, November, 2010 Census date Procedure B PES date Zainab Mahmoud Fathi Zainab Mahmoud Nadia Fathi Zainab, Mahmoud Nadia Zainab, Mahmoud Nadia

United Nations Workshop on the 2010 World Programme on Population and Housing Censuses: Census Evaluation and Post Enumeration Surveys, Amman, Jordan, November, 2010 Measuring Omissions & Erroneous Counts (contd.) Procedure C  Identifies all current residents living at the same address at the time of PES  Also identifies persons who lived at the sample address during the census date  Only census date residents (non-movers and out-movers) are, however, matched with census records  Estimates of out-movers are calculated from in-movers from proc. B. Estimates of matched out-movers are the same as in-movers (from proc. A)  Estimates of non-movers and the matched rate for out- movers are calculated from proc. A  Procedure C is a combination of procedures A & B

United Nations Workshop on the 2010 World Programme on Population and Housing Censuses: Census Evaluation and Post Enumeration Surveys, Amman, Jordan, November, 2010 Census date Procedure C PES date Zainab Mahmoud Fathi Zainab Mahmoud Nadia Fathi Zainab, Mahmoud, Nadia …Fathi Zainab, Mahmoud, Nadia …Fathi

United Nations Workshop on the 2010 World Programme on Population and Housing Censuses: Census Evaluation and Post Enumeration Surveys, Amman, Jordan, November, 2010 Strengths and Weaknesses of Procedure A Advantages  Matching of non-movers and out-movers relatively simple and inexpensive – searches limited to sample areas and their adjacent areas Limitations  Out-movers no longer at the sample address  Getting information from proxy respondents difficult especially where the whole household moved  Susceptible to underestimation of out-movers and omissions

United Nations Workshop on the 2010 World Programme on Population and Housing Censuses: Census Evaluation and Post Enumeration Surveys, Amman, Jordan, November, 2010 Strengths & Weaknesses of Procedure B Advantages  Field procedures simpler  Provides better estimates of movers Limitations  Higher cost of matching as it involves in-movers being identified within areas where they were during the census  The above may result in extended matching because clusters (EAs) may not be in PES sample – more of a problem where addresses are lacking or inadequate  Not sure whether failure to match means an actually omitted person or incorrectly located

United Nations Workshop on the 2010 World Programme on Population and Housing Censuses: Census Evaluation and Post Enumeration Surveys, Amman, Jordan, November, 2010 Strengths and Weaknesses of Procedure C Advantages  Method takes advantage of strengths of both procedures A & B  Reduced matching difficulties  Improved estimation of movers Limitation  Relatively expensive, requires enumeration of in-movers, out-movers and non-movers

United Nations Workshop on the 2010 World Programme on Population and Housing Censuses: Census Evaluation and Post Enumeration Surveys, Amman, Jordan, November, 2010 Thank You!