OPM undertook an independent evaluation of the results of country-led PSIA on national policy-making and planning. The evaluation covered 13 UNDP-funded PSIA on various policy reforms, with case study fieldwork in five countries (Benin, Uganda, Sierra Leone, Morocco and Malawi). PSIAs are the analysis of intended and unintended impacts of policy reforms on the well-being or welfare of different social groups, with a particular focus on the poor and vulnerable. The approach analyses the distributional impacts of policy reforms in order to increase the extent to which equity and poverty reduction are considered in policy design and processes. The evaluation addressed the following questions: 1. How effective have PSIAs been in influencing planning and policy processes? 2. How have PSIAs sought to influence in-country policy-making? and 3. What factors determine whether or not a PSIA is effective in influencing in-country policy processes?