| Obs. | Mean | Std. dev. | Min | Max | |
| Parents | |||||
| Age | 4,999 | 61.25 | 4.642 | 55 | 70 |
| Gender (Male = 0) | 4,999 | 0.200 | 0.401 | 0 | 1 |
| Education levela | 4,922 | 2.631 | 0.793 | 1 | 4 |
| Occupational skill level | 4,999 | 3.037 | 1.101 | 1 | 4 |
| Graduate (Yes = 1) | 4,999 | 0.159 | 0.365 | 0 | 1 |
| First child | |||||
| Age | 4,999 | 33.11 | 4.272 | 25 | 40 |
| Gender (Male = 0) | 4,999 | 0.499 | 0.499 | 0 | 1 |
| Education levela | 4,975 | 3.485 | 0.574 | 1 | 4 |
| Occupational skill level | 4,999 | 2.084 | 0.983 | 1 | 4 |
| Graduate (Yes = 1) | 4,999 | 0.518 | 0.499 | 0 | 1 |
| Raised by both parents (Yes = 1) | 4,996 | 0.932 | 0.253 | 0 | 1 |
| Family size | 4,995 | 5.771 | 2.226 | 2 | 17 |
| Obs. | Mean | Std. dev. | Min | Max | |
| Parents | |||||
| Age | 4,999 | 61.25 | 4.642 | 55 | 70 |
| Gender (Male = 0) | 4,999 | 0.200 | 0.401 | 0 | 1 |
| Education levela | 4,922 | 2.631 | 0.793 | 1 | 4 |
| Occupational skill level | 4,999 | 3.037 | 1.101 | 1 | 4 |
| Graduate (Yes = 1) | 4,999 | 0.159 | 0.365 | 0 | 1 |
| First child | |||||
| Age | 4,999 | 33.11 | 4.272 | 25 | 40 |
| Gender (Male = 0) | 4,999 | 0.499 | 0.499 | 0 | 1 |
| Education levela | 4,975 | 3.485 | 0.574 | 1 | 4 |
| Occupational skill level | 4,999 | 2.084 | 0.983 | 1 | 4 |
| Graduate (Yes = 1) | 4,999 | 0.518 | 0.499 | 0 | 1 |
| Raised by both parents (Yes = 1) | 4,996 | 0.932 | 0.253 | 0 | 1 |
| Family size | 4,995 | 5.771 | 2.226 | 2 | 17 |
aNonresponders on education were coded as 99, biasing the summary statistics. Those observations were removed.
Education: No formal education = 1, Primary education = 2, Secondary education = 3, Tertiary education = 4.
Occupational skills: Unemployed = 4, Low skilled = 3, Mid skilled = 2, High skilled = 1.