This book is a somewhat unusual depiction of a difficult policy issue. It transcends almost all boundaries because of its constant change and its movement across many different participants.It was found attached to a range of policy topics, methodologies and approaches. Some of these were familiar while others seemed new. Interest in this topic was exhibited across the globe and did not appear to be delivered along with a narrow political agenda.While researchers tended to re-examine classic public policy literatures (such as those dealing with implementation, federalism and budgeting) they did so by raising unusual issues. But this was not typical since analysts are likely to emphasize similarities rather than differences in settings.