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outcome of the game be? 14 Game Theory: Lecture 2 Dominant Strategies Dominant Strategies
Example: Prisoner’s Dilemma.
Two people arrested for a crime, placed in separate rooms, and the
authorities are trying to extract a confession. prisoner 1 / prisoner 2 Confess Don’t confess
Confess
(−4, −4)
(−1, −5)
Don’t confess
(−5, −1)
(−2, −2)
What will the outcome of this game be?
Regardless of what the other player does, playing “Confess” is better
for each player.
The action “Confess” strictly dominates the action “Don’t confess”
Prisoner’s dilemma paradigmatic example of a selfinterested, rational
behavior not leading to jointly (socially) optimal result.
15 Game Theory: Lecture 2 Dominant Strategies Prisoner’s Dilemma and ISP Routing Game
Consider two Internet service providers that need to send traﬃc to
each other
Assume that the unit cost along a link (edge) is 1
ISP1: s1 t1
ISP2: s2 t2 s1
t2
DC C Peering points
t1 s2 This situation can be modeled by the “Prisoner’s Dilemma” payo...
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 Spring '10
 AsuOzdaglar
 Game Theory

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