Suppose that, on average, men earn $20 an hour and have an average of 15 years of schooling. Women earn $15 an hour and have an average of 14 years of schooling. If the estimated return to schooling for men is 0.30 (implying that each additional year of schooling translates into an additional 30 cents per hour), then the gender gap in schooling explains:

20% of the wage gap between men and women

More than 100% of the wage gap between men and women

15% of the wage gap between men and women

None of the wage gap between men and women

6% of the wage gap between men and women