According to the World Economic Forum, the occupational gender gap with men dominating well-remunerated STEM careers is a key factor in the gender pay gap. However, the problem of underrepresentation of women in STEM fields is mitigated or reversed in some Eastern European and Islamic countries. This disparity suggests that cultural factors are at play. Gender-segregated schooling, which is commonly practiced in Islamic countries, is often seen as a contributing factor. However, the issue of gender-segregated education sparks much controversy. Critics argue evidence is lacking, and segregation may foster sexism and hinder social skills.