Create a basic multi-player browser game (simpler than the MS Hearts interface), then ask for people to play it. Make the game robust enough to test your ideas, yet simple enough that participants can quickly learn the rules and play the game properly - a condition that still allows for great complexity, depending upon the participants.

Run many trials, contrast the results of the games with your predictions, and revise or discard your hypothesis as necessary. Slowly introduce confounds into your game to test its real-world viability. Ultimately run a long-term game (a couple of weeks or so) in a real world setting as a mock trial. Scale up from there.

In other words, experiment. Prove the feasibility of the idea then build around it. Perhaps the above isn't even necessary; try your best to falsify the idea with the least possible amount of resources, I believe 'twas recommended. The above suggests one manner in which that may be accomplished.