Isabelle Tsakok has worked on issues of economic development, particularly for agriculture and rural areas, for more than 25 years, primarily as staff at the World Bank and, since retirement, off and on, as consultant. Her professional activities focus on the policy, institutional and incentive environment for agriculture, agri-business and rural development in open, market-oriented and transition economies. Dr Tsakok's involvement in agricultural policy analysis, program and project formulation and evaluation, and research and training activities has been conducted throughout the developing world, including in Africa, Asia, the Middle East and Latin America. She is the author of Agricultural Price Policy: A Practitioner's Guide to Partial-Equilibrium Analysis (1990), a manual widely used among development practitioners. Dr Tsakok also developed the policy simulation game EXACTION with Professor Graham Chapman, then at Cambridge University. She received her Ph.D. in economics from Harvard University.