Public policies at the international level: programmes and interventions by States, supranational institutions, NGOs. Elements of Evaluation Theory: intervention logic, control groups, the concept of counterfactual. Methodological problems of policy evaluation: causality, endogeneity and selection bias. Design of experiments: experimental, quasi-experimental and non-experimental designs; validity of the conclusions of an experiment. Measurement and indicators. Impact estimation techniques. Fieldwork. Preparation of an evaluation report. Case studies: social interventions, peacekeeping missions, trade embargoes, military interventions, development cooperation and aid programmes, economic and political reforms.