China Health and Nutrition Survey


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Data Cleaning

Basic data cleaning has included:

  • Corrections to ID variables
  • Corrections to the household roster
  • Deletion of duplicate records
  • Deletion of blank records
  • Out-of-range values recoded to missing

Note that only values which are clearly impossible have been recoded to missing. Decisions concerning extreme values which remain in the files are left to the discretion of individual researchers.

Please note that the data file and documentation are largely complete, but that some of the data are not yet fully prepared, cleaned and documented. We are continuing to work on some portions of the data and will release additional pieces of data, make corrections, and provide additional materials in the future. CHNS users must understand that the data are subject to correction.

UNC Carolina Population Center

Last Modified: 01/16/2007
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