In 1987, Sandberg enrolled at Harvard College. She graduated in 1991 "summa cum laude" and Phi Beta Kappa with a Bachelor of Arts in economics and was awarded the John H. Williams Prize for the top graduating student in economics. While at Harvard, she co-founded an organization called Women in Economics and Government. She also met Professor Lawrence Summers, who became her mentor and thesis adviser. Summers recruited her to be his research assistant at the World Bank, where she worked for approximately one year on health projects in India dealing with leprosy, AIDS, and blindness.