The world is not flat; cities are more important than ever before. We observe an increased competition between cities to attract, create, and retain talents and innovative companies. For urban leaders, the capacity to innovate is central to urban competitiveness. One of the recent trends in local economic development is the concept of innovation districts. The toolkit analyzes the re-emergence of downtown areas, the importance of innovation for urban competitiveness, the recipe for designing a successful innovation district, and provides an innovation district's framework - urban, productive,...