He spent three years as a Post-Doc at the International Center for Tropical Agriculture (CIAT) in Colombia, working on bioeconomic modelling of livestock production systems in Latin America, and then three years based at the University of Edinburgh on crop and household modelling projects in Central America and southern Africa. In 1990, he joined the International Fertilizer Development Center in Alabama, and was involved in projects in various countries in Latin America, Africa, Asia and Eastern Europe. He joined ILRI in 1996, and was Coordinator of the Systems Analysis and Impact Assessment Programme until 2002. Since then, he works part-time for ILRI based in Edinburgh, and has a part-time research position with the Institute of Atmospheric and Environmental Sciences at the University of Edinburgh.Area of Expertise: Systems characterisation and analysis, ex post and ex ante impact assessment, and a wide variety of systems modelling.Research Interest: Climate change impacts on livelihoods; evolution of livestock systems in response to global drivers of changeCurrent research projects/ Research: Household modelling of agro-pastoral communities Assessing the impacts of climate change on households Technology targetting and policy assessment decision support tools Global hotspot analyses of poverty, livestock development and environmental issues List of Recent Publications: Reid R S, Thornton P K and Kruska R L (2004). Fragmentation and loss of habitat for pastoral people and wildlife in East Africa: concepts and issues. African Journal of Range and Forage Science 21 (3), 171–181. Galvin K A, Thornton P K, Boone R B and Sunderland J (2004). Climate variability and impacts on East African livestock herders. African Journal of Range and Forage Science 21 (3), 183-189. Nicholson C F, Thornton P K and Muinga R (2004). Household-level impacts of dairy cow ownership in coastal Kenya. Journal of Agricultural Economics 55 (2), 175-195. Thornton P K, Fawcett R H, Galvin K A, Boone R B, Hudson J W and Vogel C H (2004). Evaluating management options that use climate forecasts: modelling livestock production systems in the semi-arid zone of South Africa. Climate Research 26, 33-42. Reid R S, Thornton P K, McCrab G J, Kruska R L, Atieno F and Jones P G (2003). Is it possible to mitigate greenhouse gas emissions in pastoral ecosystems of the tropics? Environment, Development and Sustainability 6, 91-109. Romney D L, Thorne P, Lukuyu B and Thornton P K (2003). Maize as food and feed in intensive smallholder systems: an evaluation of some options for improved integration in mixed farming systems of Kenya, Tanzania and Zimbabwe. Field Crops Research 84, 159-168. Thornton P K, Kristjanson P M and Thorne P J (2003). Measuring the potential impacts of improved food-feed crops: methods for ex ante assessment. Field Crops Research 84, 199-212. Thornton P K, Kruska R L, Henninger N, Kristjanson P M and Reid R S (2003). Livestock and poverty maps for research and development targeting in the developing world. Land Use Policy 20, 311-322. Jones P G and Thornton P K (2003). The potential impacts of climate change in tropical agriculture: the case of maize in Africa and Latin America in 2055. Global Environmental Change 13, 51-59. Kruska R L, Reid R S, Thornton P K, Henninger N and Kristjanson P M (2003). Mapping livestock-orientated agricultural production systems for the developing world. Agricultural Systems 77, 39-63. Thornton P K, Galvin K A and Boone R B (2003). An agro-pastoral household model for the rangelands of East Africa. Agricultural Systems 76, 601-622.