Purchase Solution

# Nash equilibrium

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You operate in a duopoly in which you and a rival must simultaneously decide what price to advertise in the weekly newspaper. If you each charge a low price, you each earn zero profits. If you each charge a high price, you each earn profits of \$3. If you charge different prices, the one charging the higher price loses \$5 and the one charging the lower price makes \$5.

a. Find the Nash equilibrium for a one-shot version of this game.
b. Now suppose the game is infinitely repeated. If the interest rate is 10 percent, can you do better than you could in a one-shot play of the game? Explain.
c. Explain how "history" affects the ability of firms in this game to achieve an outcome superior to that of the one-shot version of the game.

##### Solution Summary

Find the Nash equilibrium for a one-shot version of this game.

##### Solution Preview

Nash Equilibrium
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<br>a. Normal Form of the game
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<br>(Columns of the table may get mis-aligned because of BM formatting my output somewhat incorrectly; my apologies, please)
<br>
<br> Low Price High Price
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<br> Low (0,0) (5,-5)
<br> You
<br> High (-5,5) (3,3) ...

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