Evidence-based policy-making and other recent reforms in public steering emphasize the role systematic evidence can play in improving decision making and public policies. Increasing deficits heighten the pressure on public authorities to legitimate public spending and to find savings. Existing studies show that the influence of research-based information on decision making is shaped by several factors, but they typically do not distinguish between different types of information. Our contribution aims to compare the influence of efficiency analysis to information about performance effectiveness. We do so by looking at 10 cases in which public policies are being revised at the federal level in Switzerland, and do so by tracing the entire policy reform process. This qualitative analysis sheds light on which actors use efficiency information, how and under which conditions, and highlights the contribution of efficiency analysis for evidence-based policy-making. (Contains 10 tables and 2 figures.)