Dr. Sebastian Martinez is the Director of Evaluation at 3ie where he leads the generation of evidence through impact evaluations and applied research. Sebastian has over 20 years of experience producing and using rigorous evidence to inform decision-making. He has led more than 50 impact evaluations and conducted trainings for hundreds of professionals in governments and development organizations around the world. Prior to joining 3ie, he served in several economist positions at the World Bank and Inter-American Development Bank (IDB), most recently as a Principal Economist at the IDB. In these roles, he conducted policy-oriented research on the impacts of development programs, provided technical support and economic analysis for Bank operations, and advised clients in a diverse set of countries, primarily in Latin America, the Caribbean and Africa. Sebastian holds a Ph.D. in Economics from the University of California at Berkeley, with a specialization in economic development and applied microeconomics.