U2 lead singer Bono, third from left, paid a visit to MIT to meet the leaders of the Abdul Latif Jameel Poverty Action Lab in the Department of Economics on Tuesday, Dec. 6, accompanied by staff from the advocacy group Debt, AIDS, Trade, Africa (DATA). He is joined by, from left, Professor Bengt Holmstrom, head of economics; Rachel Glennerster, executive director of the lab; and economics Professor Abhijit Banerjee, one of the lab's directors. Photo / Justin Knight

A version of this article appeared in MIT Tech Talk on December 14, 2005 (download PDF).