In sub-Saharan Africa women comprise alarge proportion of the agricultural labor force, yet theyare consistently found to be less productive than malefarmers. The gender gap in agriculturalproductivity-measured by the value of agricultural produceper unit of cultivated land-ranges from 4-25 percent,depending on the country and the crop.1 The World BankAfrica Gender Innovation Lab, UN Women, and the UNDP-UNEPPoverty-Environment Initiative jointly produced a report toquantify the cost of the gender gap and the potential gainsfrom closing that gap in Malawi, Tanzania, and Uganda. Thisreport illustrates why the gender gap matters. Closing thegender gap of 28 percent in Malawi, 16 percent in Tanzaniaand 13 percent in Uganda could result in gross gains to GDP,along with other positive development outcomes, such asreduced poverty and greater food security. However, it isimportant to stress that these potential gains do not comewithout cost. Closing the gender gap will require changingexisting or designing new policies, which may requireadditional resources.