Various signaling probs with almost random screening

[davidrpugh]

Case where IPD condition is not satisfied:

In the plots below, I use the following payoff matrix:

payoffs = {'PiaA': 9.0, 'PiAA': 5.0, 'Piaa': 3.0, 'PiAa': 2.0}

Note the for this payoff matrix the iterated prisoner's dilemma (IPD) condition (i.e., 2 * PiAA > PiaA + PiAa is not satisfied.

Case where IPD condition is satisfied:

In the plots below, I use the following payoff matrix:

payoffs = {'PiaA': 7.0, 'PiAA': 5.0, 'Piaa': 3.0, 'PiAa': 2.0}

Note the for this payoff matrix the iterated prisoner's dilemma (IPD) condition (i.e., 2 * PiAA > PiaA + PiAa is satisfied. As posited by @markeschaffer, imposing the IPD condition seems to eliminate the stable/balanced polymorphism (i.e., interior equilibria).

@markeschaffer , @PaulSeabright your thoughts?

[davidrpugh]

These graphics are no longer relevant.