These studies, like most, fail to distinguish between cooridination and cooperation. In coordinating, I need only know that the other person and I have fixed some convention to sort out our problem, such as traffic signals, line-ups, or some other device. Thomas Schelling showed, in the mid 60's, that arguably some of these conventions were close to being hard wired.

Cooperation, on the other hand, requires us to make accurate guesses about each others preferences, and then act in a manner which may open us up to be taken advantage of. There is very little evidence that we are hard wired to make good interpersonal comparisons of utility - otherwise active listening would not be so hard.

Litigation is a method for resolving each peron's best alternative to negotiation. Sometimes after the costs of this method, there is no surplus value.

The tit for tat solution that you are about to cite must be used with great care - just changing the names of the strategies will often bring about the desired result.