Table 4.

Sample selection and size of the sample for each birth event.

Source: Own calculation on GGS data

	N
Initial sample size	34,647
Not in co-residential union at interview time	9840
Partner’s respondent education missing or ISCED ≤ 2	1575
Homosexual couples	44
Previous children from other relationships	1622
Date union formation missing	39
Date first birth missing	14
Woman’s age missing	52
Time of birth ≤ date of union formation	694
Male partner’s age missing or < 15 at time of union	13
Missing information independent variables (Bulgaria, Lithuania and Romania)	119
Sample first births	15,296
Sample second births	12,673
Sample third births	7401