Siwa is a research agricultural economist in the Conservation and Environment Branch of the Resource and Rural Economics Division at USDA's Economic Research Service (ERS). He leads the development and extension of ERS's detailed agricultural sector and environmental impact analysis tool—the Regional Environment and Agriculture Programming (REAP) model—which is designed to examine the environmental impacts of U.S. agricultural production practices, and the performance of U.S. agricultural production systems under environmental, market and policy shocks.
Siwa Msangi has worked on agriculture, natural resource management and international development policy for the past 20 years. Siwa's past research has looked broadly at the major socio-economic and bio-physical drivers affecting agricultural (crop, livestock, and fish) production systems—and their impacts on trade, nutrition, poverty and the environment. Siwa has also done work on the intersection of energy and agriculture, and the well-being dimensions of energy access and its connections to food security.
Before joining ERS, Siwa was an economist in the Joint Global Change Research Institute (JGCRI)—which is part of the U.S. Department of Energy's Pacific Northwest National Laboratory (PNNL). He joined JGCRI-PNNL in late 2019, after serving as a short-term consultant for the World Bank's Independent Evaluation Group. Prior to that, he was a senior research fellow in the International Food Policy Research Institute (IFPRI), for the Environment and Production Technology Division and worked under IFPRI's research theme on natural resource management (until 2018). Siwa joined IFPRI in August 2004 as a post-doctoral fellow.
Doctoral degree in agricultural and resource economics, University of California at Davis (2004) Masters degree in international development policy, Stanford University (1997) Bachelor of Science degree in chemical engineering (1995)