Andy Sumner is an inter-disciplinary development economist, who has published extensively on poverty, inequality and economic development including nine books. His research is at the interface of development studies and development economics, with a particular focus on middle-income and emerging economies.He has been listed by Foreign Policy magazine’s Top 100 Global Thinkers and Devex website’s ‘Global Development Leaders’ for his work on the ‘new bottom billion’ about poverty in middle-income countries.