This groundbreaking comparative study explores the influence of PPDs on local development and sector competitiveness. The report presents 20 case studies: 10 on the citrus fruit sector and the cruise industry in Egypt, Lebanon, Malta, Spain and Turkey, and another 10 in various sectors in one single region of Spain, Catalonia. Outlining the variety of results from PPD processes on sector-specific development and competitiveness both regionally for the Mediterranean and within a single regional jurisdiction, the report provides a set of design and implementation guidelines and advocates a new approach: Local Sector-Specific PPDs (LSPPDs).