This publication is a report prepared by the Regional Development Policy Division of the OECD Directorate of Public Governance and Territorial Development. Earlier OECD studies have amassed scattered evidence for the key factors for regional growth and the benefits associated with an integrated territorial approach. This publication is an attempt to develop a more focused ‘lesson learned’ by addressing 23 case studies of regions with varying degrees of growth potential. It is organised as the standard OECD document with an Executive Summary of three pages followed by a seven-page Introduction. The reader can glean the highlights from the two sections as they are presented largely in bulleted form. Three chapters follow.