# In the chapter, we argue that the payoff to the United States is 210 when (either type) Soviets defy

In the chapter, we argue that the payoff to the United
States is 210 when (either type) Soviets defy the U.S. threat; these payoffs
are illustrated in Figure 14.3. Suppose now that this payoff is in fact 212
rather than 210.

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In the chapter, we argue that the payoff to the United States is 210 when (either type) Soviets defy
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(a) Incorporate this change in payoff into a game tree
similar to the one in Figure 14.4.

(b) Using the payoffs from your game tree in part (a),
find the effectiveness condition for this version of the U.S.–USSR brinkmanship
game.

(c) Using the payoffs from part (a), find the acceptability
condition for this game.

(d) Draw a diagram similar to that in Figure 14.5,
illustrating the effectiveness and acceptability conditions found in parts (b)
and (c).

(e) For what values of p, the probability that the
Soviets are hard-line, is the pure threat (q – 1) acceptable? For what values
of p is the pure threat unacceptable but brinkmanship still possible?

(f) If Kennedy was correct in believing that p lay
between 13 and 12, does your analysis of this version of the game suggest that
an effective and acceptable probabilistic threat existed? Use this example to
explain how a game theorist’s assumptions about player payoffs can have a major
effect on the predictions that arise from the theoretical model.