This session explored the boundaries and connections between public policy as an object of scientific research and public policy as an activity. Academics study policies to support policymakers, while practitioners need scientific support to know evidence about how things are done or should be done. And yet, while evidence-based-policy should have come to an age, the two realms do not often collaborate and, rather, risk being insulated from each other. This is actually an old issue: "there is nothing a government hates more than being well informed" (J.M. Keynes, 1937). Prominent experts from both academic and policymaking fields are going to explore mutual understandings – and misunderstandings – between research and practice, on both epistemological and pragmatic dimensions.