(a) Construct the five-by-five payoff table for their location game. (b) Eliminate dominated strategies as far as possible. (c) In the remaining table locate all pure strategy Nash equilibria. (d) If the game is altered to one with sequential moves, where the first vendor chooses her location first and the second vendor follows, what are the locations and sales that result from the rollback equilibrium?

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5. Along a stretch of a beach are 500 children in 5 clusters of 100 each.
(Label the clusters A, B,C,D and E) Two ice cream vendors are deciding
simultaneously where to locate. They must choose the exact location
of one of the clusters. If there is a vendor in one cluster, all 100 children
in that cluster will buy an ice cream. For clusters without a vendor, 50
of the 100 children are willing to walk to a vendor who is one cluster
away, only 20 are willing to walk to a vendor two clusters away, and
none are willing to walk the distance of three or more clusters. The
ice cream melts quickly, so the walkers cannot buy for the non-walkers.
If vendors choose the same cluster, each will get 50 % of share of the
total demand for ice cream. If they choose different clusters, then those
children for whom one vendor is closer than the other will go to the
closer one,
and those for whom the two are equidistant will split 50%
each. Each vendor maximizes her sales.
(a) Construct the five-by-five payoff table for their location game.
(b) Eliminate dominated strategies as far as possible.
(c) In the remaining table locate all pure strategy Nash equilibria.
(d) If the game is altered to one with sequential moves, where the first
vendor chooses her location first and the second vendor follows,
what are the locations and sales that result from the rollback
equilibrium?
Transcribed Image Text:5. Along a stretch of a beach are 500 children in 5 clusters of 100 each. (Label the clusters A, B,C,D and E) Two ice cream vendors are deciding simultaneously where to locate. They must choose the exact location of one of the clusters. If there is a vendor in one cluster, all 100 children in that cluster will buy an ice cream. For clusters without a vendor, 50 of the 100 children are willing to walk to a vendor who is one cluster away, only 20 are willing to walk to a vendor two clusters away, and none are willing to walk the distance of three or more clusters. The ice cream melts quickly, so the walkers cannot buy for the non-walkers. If vendors choose the same cluster, each will get 50 % of share of the total demand for ice cream. If they choose different clusters, then those children for whom one vendor is closer than the other will go to the closer one, and those for whom the two are equidistant will split 50% each. Each vendor maximizes her sales. (a) Construct the five-by-five payoff table for their location game. (b) Eliminate dominated strategies as far as possible. (c) In the remaining table locate all pure strategy Nash equilibria. (d) If the game is altered to one with sequential moves, where the first vendor chooses her location first and the second vendor follows, what are the locations and sales that result from the rollback equilibrium?
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