LS variable metadata
Variable: MAMTBNB
Table: NBIR
Short description: Month of parents' marriage recorded at registration of new birth on sample date.
Full description:  
Coding notes: 01-12 = January - December
space= Birth outside marriage
If year of marriage is imputed then month of marriage is set to January or July
Units of measurement:  
Source: Draft entry for Births (Form 309): confidential particulars Question 3
Former name of variable:  
Derived: N
Derivation: Not available
Date range: To: 19810405 
Keyword: Marital
Comparable variables for other individuals:  
Comparable variables for other times:  
Restricted: N
Data type: Text
Length of field: 2
Reference 1: See LS Technical Volume (Hattersley and Creeser, 1995) p342 (live birth registration draft entry form), p345 (record of live birth form), pp24-25, pp94-95 (general details), pp99-101 (comparability of data), pp109-115 (data quality).