Four billion low-income people, a majority of the world’s population, constitute the base of the economic pyramid. New empirical measures of their behavior as consumers and their aggregate purchasing power suggest significant opportunities for market-based approaches to better meet their needs, increase their productivity and incomes, and empower their entry into the formal economy.
HAMMOND, A. KRAMER, W. KATZ, R. TRAN, J. WALKER, C. WRI (2007): The Next 4 Billion. Market Size and Business Strategy at the Base of the Pyramid. Washington DC: World Resources Institute (WRI) URL [Accessed: 22.06.2011]