• 1. Introduction
  • 2. Spillover Game
  • 2.1. Experimental implementation
  • 3. Experimental Procedure
  • 4. Results
  • 4.1. The nature of cooperation in the Spillover Game
  • 4.2. The robustness of results
  • 4.3. Determinants of contributions
  • 5. Conclusions
  • References