How is the “folio”, which identifies each household in the survey, built?
The folio consists of 8 digits. Those folios composed of less than 8 digits are folios that implicitly have zeros (‘0’) to the left of the number (as many ‘0’’s as needed to complete the 8 spaces). The folio is made up as follows: the first 5 digits correspond to a consecutive number. The sixth digit identifies the type of home (Main- 0 or additional- from 1 to 9). The seventh and eighth digits are always 00. The folio variable is a unique identifier for homes; there is no need to counter cross with any other variables in order to identify the homes between different books. For more information, consult the user’s guide.
