Unexpected number of cases as result of a concatenation operation.
I have extracted from 2025 and 2024 Census SIPP files the records for householders in the month of December. There are 13910 records in 2025 and 15,877 in 2024. I am using the Catenate command to link the two files, not a merge or update command. I am creating a new file with a column indicating source. I get a file of 15,877 records, not 33000. I get no source column. Since these records ...