How should evaluations of problem-oriented policing and situational crime prevention projects be conducted? Although evaluation has been a driving force in the recent worldwide growth of the two approaches, both of which focus on reducing opportunities for committing crimes, there has been a growing consensus among researchers that evaluations of many such crime prevention programs have been unsatisfactory. In this book, the authors consider how best to improve evaluations, what types of assessments will be most useful to policymakers and practitioners, and what has been learned from past evaluations.