The Campbell Collaboration: a proposal for systematic, multinational, and continuous reviews of evidence. In: Davies P, Petrosino A, Chalmers I, editors. The effects of social and educational interventions: developing an infrastructure for international collaboration to prepare, maintain and promote the accessibility of systematic reviews of relevant research. London: School of Public Policy, University College London.
Background paper for the meeting at the School of Public Policy, University College, London, UK on 15-16 July 1999 to discuss the establishment of the Campbell Collaboration.
