The literatures on evidence based policy and knowledge utilization have been concerned with the conditions under which evidence is used (or neglected) as a basis for policy-making. In this book proposal, different models of evidence use, including rational, bureaucratic and government politics models are used to characterize different institutional setups and utilizations of evidence in the policy process. By characterizing institutional setups and utilizations across different contexts, the proposal aims at capturing what procedures, evidence strategies and motivations underpin the use of evidence by public authorities as well as the extent to which different actors and models influence the collection, interpretation and utilization of evidence in policy-making.