Stephen is Professor of Evaluation at PERU, Research Associate at NatCen Social Research, Visiting Fellow at the Policy Studies Institute and Honourary Fellow at the Institute for Employment Studies. Stephen is a member of the Government’s Trials Advisory Panel.
Stephen’s interests are in different theories of causation in the social sciences and their implications for the design of programme and policy evaluation. He has considerable experience in the design, execution and reporting from pragmatic randomised field trials in social policy having been directly responsible for seven such studies. Stephen is also interested in the design of quasi-experimental forms of evaluation and natural experiments. Most recently his research has focused on the integration of mid-level theory into pragmatic randomised field trials in order to improve causal leverage