Wage and hours imputation flags

I am trying to understand the purpose of the imputation flags and also the meaning of the “CODES”?

QUHRSWORKT
Q1HOURWAGE

These allocation flags are designed to alert data users to cases where values are not exactly as reported by respondents. Pages 7-8 of the original 2019 ATUS Data Dictionary from BLS offer additional information on how they code these variables; please note that because this is for the original public use data and not the IPUMS ATUS data, the variable names will differ. Please let me know if you have further questions about this topic in general, or if there is a specific code for one of these variables that you would like more information on.