Apple embraced co-creation to enhance the speed and scope of its innovation, generating over $1 billion for its App-Store partner-developers in two years, even as it overtook Microsoft in market value. Starbucks launched its online platform MyStarbucksIdea.com to tap into ideas from customers and turbocharged a turnaround. Unilever turned to co-creation for redesigning product lines such as Sunsilk shampoo and revitalized growth. Nike achieved...