The document discusses how the crowd is changing supply chains through collaborative consumption and the sharing economy. It outlines 6 types of goods and services that people are sharing (goods, services, space, transportation, money, food) and provides examples. It then discusses how big the sharing economy is today and why people share. It outlines 3 business models companies can use in this new economy: turning products into services, turning services into marketplaces, and activating marketplaces to co-create products. Finally, it discusses how companies can deploy social technologies and tap into crowd-based supply chains by integrating customers into business units from innovation to sales.