Consider the game of chicken in Chapter 4, with slightly
more general payoffs (Figure 4.13 had k 5 1):
Suppose this game is played repeatedly, every Saturday
evening. If k , 1, the two players stand to benefit by cooperating to play
(Swerve, Swerve) all the time, whereas if k . 1, they stand to benefit by
cooperating so that one plays Swerve and the other plays Straight, taking turns
to go Straight in alternate weeks. Can either type of cooperation be sustained?