[davidovitch]

Exactly, the paper also expresses hopes that people continue to study of human social interaction:

>> Moving forward, experiments in artificial social contexts like ours appear to be a very powerful tool to examine strategic behavior in socially relevant situations. We hope that our work will stimulate further work along these lines.

It is clear it will be nearly impossible to account for all the factors in one controlled experiment. Note that such "total experiments" in the other scientific fields is challenging as well. Usually one first tries to understand certain fundamental processes, then they move on to the interactions between them.