Most IPUMS data transformations are performed using variable harmonization tables that specify how each value in the source data is recoded. Some variables also require programming logic in addition to the harmonization table. The harmonization documents for this variable are:
Instructions for interpreting harmonization documents
Description
MTONGBY indicates the mother tongue of the respondent in Belarus and is the language usually spoken by the person in his/her home in the early childhood.
Comparability — General
The language of young children was to be determined from their parents.
Response categories are more detailed in 1999 than in 2009.
