In this course, we will look at designs of impact evaluation, mainly of policy interventions. We will discuss the desirability of evaluations and the main conceptual problems in identifying the causal impact of policy interventions. We will discuss different econometric techniques that have been proposed in the literature to deal with these issues relating them to the economics behind the evaluation problem. In particular, we will discuss: Randomized Controlled Trials, Propensity Score Matching, Regression Discontinuity Design, Difference in Difference Methods, Instrumental Variables, Structural Models. There will be a number of applications that will illustrate the techniques discussed and some practical exercises. The focus will be on applications in Colombia and Latin America.