Preface: Better Evaluation for Evidence-Based Policy: Place Randomized Trials in Education, Criminology, Welfare, and Health

% ROBERT BORUCH Phrases such as evidence-based policy ' are seductive and are used promiscuously in some quarters. Here, we take the phrase and its intent seriously, as others have. In the international sector, for instance, the Campbell Collaboration was created to generate systematic reviews of dependable evidence on the effects of policies, programs, and practices. This is in the arenas of crime and justice, education, and social services. The Cochrane Collaboration, Campbells older sibling, was created to achieve a similar aim in health care. Their reviews of evidence are