Chapter 7 closes Part II of the book by providing a cross-cutting analysis of the three case studies. My primary purpose in this chapter is to compare the three different forms of collaborative business networks described in this book. Each has intermediaries that serve different functions and that contribute differently to the networks’ success. Each comes with its own advantages and challenges. Finally, each has benefited from, and been burdened by, a range of laws and regulations. Chapter 7 identifies critical needs that cut across all three sharing networks. It closes by articulating a number of core design principles that appear particularly efficacious (at least at this early stage of analysis) in the development of collaborative business networks, and in supporting urban workers more generally.