Toc: Part I : Crowdsourcing : Fundamentals and the Role of Crowds and Communities 1. Introduction to the Chapters, Allan Afuah, Christopher Tucci, and Gianluigi Viscusi 2. Crowdsourcing : A Primer and Framework, Allan Afuah 3. Three's a Crowd?, Gianluigi Viscusi and Christopher Tucci 4. How Firms Leverage Crowds and Communities for Open Innovation, Joel West and Jonathan Sims 5. Tapping into Diversity through Open Innovation Platforms: The Emergence of Boundary Spanning Practices, Natalia Levina and Anne-Laure Fayard Part II : Tournament-Based Crowdsourcing 6. A Problem in the Making: How Firms Formulate Sharable Problems for Open Innovation Contests, Martin W. Wallin, Georg von Krogh, and Jan Henrik Sieg 7. The Role of Information Patterns in Designing Crowdsourcing Contests, Gireeja V. Ranade and Lav R. Varshney Part III : Collaboration-Based Crowdsourcing 8. Renegotiating Public Value with Co-Production, Antonio Cordella, Andrea Palletti, and Maha Shaikh 9. The Road to Crowdfunding Success: A Review of Extant Literature, Vincenzo Buttice, Chiara Franzoni, Cristina Rossi-Lamastra, and Paola Rovelli 10. Co-Creation from a Telecommunication Provider's Perspective: A Comparative Study on Innovation with Customers and Employees, Milica Sundic and Karl-Heinz Leitner Part IV: Hybrids: Tournament-Based and Collaboration-Based Crowdsourcing 11. Co-opetition in Crowdsourcing: When Simultaneous Cooperation and Competition Deliver Superior Solutions, Allan Afuah 12. Predi