Social Innovation and Entrepreneurship in the Fourth Sector: Sustainable Best-Practices from Across

Social Innovation and Entrepreneurship in the Fourth Sector.- Part I: Consolidation of the Fourth Sector Within the Solidarity Economy.- Humanitarian Social Logistic and the Fourth Sector: Policy Design for Communities Affected by the Disaster.- Nonprofit Organizations of the Fourth Sector That Promote Education Social Solidarity Economy in the Fourth Industrial Revolution of Medellin, Colombia.- Social Innovation, Fourth Sector and the Commodification of the Welfare State: The Portuguese Experience.- Part II: Best-Practices Case Studies Across the World.- A Case Study of a Socially Responsible Entrepreneurship: The Local Action Group POEDA.- Case Study: How Medellin Is Creating a Hub for Impact Start-ups.- The Behobia/San Sebastián Race: Running Past the Boundaries of Sport.- The Project Partnership for Local Development: The Fourth Sector and Hybrid Initiatives.- Social Innovative Approaches on Health Care: Evidence from Home Hospitalization in Portugal-the Elvas Study.- Havírov: "The City of Green" and Its Fourth Sector Sustainability Activities. One Case Study from the Czech Republic.- Commitment to Social Responsibility in a Third Sector Organization: The Case of Alfazema Flower.- Part III: Discussion About Social Innovation and Business.- Sustainability Perspective Through Social Responsibility in Microenterprises of Tulancingo, Hidalgo, Mexico.- Social Innovation: Insights in the Fourth Sector in Portugal.- The Fourth Sector and the 2030 Strategy on Green and Circular Economy in the Region of Extremadura.- Marketing for Business Opportunities Management on Foreign Investment and Productive Enchainments.