各位DX
以下来自OSBORN 的INTRODUCTION OF GT 一书,特此求教高手,非常感谢!
另外,哪位DX有该书的习题的全部答案?本人有其中的一部分,但不全,缺第10,15,16章答案,愿重金购买!
EXERCISE 172.2 (An entry game with a financially-constrained firm) An incumbent
in an industry faces the possibility of entry by a challenger. First the challenger
chooses whether or not to enter. If it does not enter, neither firm has any
further action; the incumbent’s payoff is TM (it obtains the profit M in each of the
following T ≥ 1 periods) and the challenger’s payoff is 0. If the challenger enters,
it pays the entry cost f > 0, and in each of T periods the incumbent first commits
to fight or cooperatewith the challenger in that period, then the challenger chooses
whether to stay in the industry or to exit. (Note that the order of the firms’ moves
within a period differs from that in the game in Example 152.1.) If, in any period,
the challenger stays in, each firm obtains in that period the profit −F < 0 if the incumbent
fights and C > max{F, f } if it cooperates. If, in any period, the challenger
exits, both firms obtain the profit zero in that period (regardless of the incumbent’s
action); the incumbent obtains the profit M > 2C and the challenger the profit
0 in every subsequent period. Once the challenger exits, it cannot subsequently
re-enter. Each firm cares about the sum of its profits.
a. Find the subgame perfect equilibria of the extensive game that models this
situation.
b. Consider a variant of the situation, in which the challenger is constrained by
its financial war chest, which allows it to survive at most T − 2 fights. Specifically,
consider the game that differs from the one in part a only in that the
history in which the challenger enters, in each of the following T − 2 periods
the incumbent fights and the challenger stays in, and in period T − 1 the incumbent
fights, is a terminal history (the challenger has to exit), in which the
incumbent’s payoff is M (it is the only firm in the industry in the last period)
and the challenger’s payoff is −f . Find the subgame perfect equilibria of this
game.