Arild Angelsen is a Professor of economics at the Norwegian University of Life Sciences (UMB) and a Senior Associate of the Center for International Forestry Research (CIFOR), Indonesia. He has done extensive research on causes of tropical deforestation over the past 15 years, and its interaction with poverty, tenure and government policies. Angelsen is global coordinator of the Poverty Environment Network (PEN), a CIFOR-led research programme collecting detailed information from about 9,000 households in 26 developing countries on forest uses and management. He has broad field experience from Southeast Asia and Eastern Africa, and has lived in Uganda, Indonesia, Australia and the USA.