2. Consider the Prisoner's Dilemma in general form, repeated infinitely:

..B............. Cooperate Defect

A Cooperate C,C L,H

Defect............... H,L D,D

where, to make this a Prisoner's Dilemma, H > C > D > L.

Imagine, all else constant, L increases. Will this make players more or less likely to cooperate when facing a Grim Trigger player?

Imagine, all else constant, r increases. Will this make players more or less likely to cooperate when facing a Tit for Tat player?