Data collection analysis on the Labour Force Survey, Census 2001 and Post Enumeration Survey of Census 2001, was made with the purpose to verify the consistency among the three statistical operations, regarding the individual characteristics classifications. Tries to understand if the different processes of data collection could have influence on the Labour Force Survey and Post Enumeration Survey extrapolated data or if the Census 2001 couldn’t characterize, for all of its extension, some subpopulations.

keywords: Labour Force Survey, Census 2001, Post Enumeration Survey of Census 2001.