Figure 2.4 presents standardised gender gaps in order to allow' comparisons across surveys. Results suggest that in Norway, as well as the vast majority of other countries, gender gaps in favour of girls grew from grade 4 (around age 10) to age 15. England, the Netherlands and New Zealand are the only countries where gender gaps tend to remain relatively stable between age 10 and age 15. Figure 2.4 however also shows that between the ages of 15 and 21-22 the gender gap in favour of females is greatly reduced in Norway as well as the majority of countries except for the Netherlands.