evidence and data for gender equality edge is a threeyear initiative led by the united nations statistics division and un women in collaboration with the food and agriculture organization of the united nations the world bank the asian development bank the african development bank and the organisation for economic cooperation and development oecd one example is the measurement of gender pay gaps besides the difficulties in measuring these gaps for selfemployed workers the raw unadjusted gender pay gap as presented in annex captures the difference between mens and womens earnings but does not tell us enough about the underlying drivers of gender inequality in pay