Policy Expo books are an exciting new series of publications from the Regional Studies Association. The books in this series are commissioned to address topical policy questions of contemporary importance to all communities engaged in regional and urban studies issues. The term "Expo" is taken to mean "a comprehensive description and meaning of an idea or theory". The publication style is to use clear and coherent narrative addressing evidence for different policy and theoretical positions. Each topic is broad in scope, achieving global reach and relevance wherever possible. There is a consistent focus on the impact of policy research both in terms its reach to policy, academic and practitioner communities and also in its significance, to show how evidence can inform policy change within regional and urban studies.