“…Realistic Evaluation (Pawson & Tilley, 1997;and in America, Chen, 1990;Weiss, 1997) and the Theories of Change (ToC) approach by the Aspen Institute , are such approaches for the evaluation of recently introduced policy instruments (Kautto & Similä, 2005). Effects models (goal-free evaluation), explanatory process models, system models, economic models (including cost-efficiency, cost-effectiveness, cost-benefit and programme theory models can also be classified as third generation methods of evaluation and are largely based on postpositivist and critical theory paradigms (Hansen, 2005).…”