Contributor.

Dennis Whittle and Elizabeth Christopherson
Ashoka Changemakers and Rita Allen Foundation

Dennis Whittle is executive chairman ofAshoka Changemakers. He was co-founder and CEO ofGlobalGivingand, earlier, Principal Economist at the World Bank where his team created the Development Marketplace.

Elizabeth Christopherson is the president and CEO ofRita Allen Foundation.

Articles by Dennis Whittle and Elizabeth Christopherson