Is it Ok to merge two ATUS data only using the variable "CPSIDP?"

#1

Dear Madam/Sir,

I have two ATUS-X extracts. Both of them have “CPSIDP.” Is it OK to merge these two data just using “CPSIDP?” “CPSIDP” uniquely identifies the respondent, right? Thank you!

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#2

CPSIDP should uniquely identify individuals. However the recommend variables for merging cases are YEAR, CASEID, and PERNUM, which should all be included you your extracts automatically.

I hope this helps.

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