| Less-educated vs. well-educated parents | |||
---|---|---|---|---|
Polyn. | CCT procedure | IW procedure | ||
degree | Diff. | z-stat | Diff. | z-stat |
 | Male | |||
0 | 0.131* | 1.664 | 0.124* | 1.884 |
1 | 0.056 | 0.490 | 0.157* | 1.803 |
2 | 0.019 | 0.146 | 0.111 | 0.957 |
 | Female | |||
0 | 0.094** | 1.974 | 0.081** | 2.228 |
1 | 0.121* | 1.711 | 0.121** | 2.005 |
2 | 0.113 | 0.892 | 0.134 | 1.566 |