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GAME THEORY

One of the most famous and most thoroughly studied examples of game theory is the Prisoner's Dilemma. In this situation, the police have caught two people and charged them with a crime. The police separate the prisoners into different rooms and give them the option of confessing. The police tell the two prisoners that they have enough evidence of the crime to send them to jail for X amount of years. However, if one prisoner confesses fully to the crime and testifies against the other but the other doesn't, then the prisoner who confessed will get get a much lighter sentence than X and the prisoner who did not confess will get a heavier sentence than X. However, if both of the prisoners confess and testify against the other, then the police have enough evidence to convict both prisoners for a slightly heavier sentence than X. Since neither of these prisoners knows what the other one is saying, we can use a decision tree to determine the dominant strategy for these people. (see figure A on attached sheet) In this dilemma, the dominant game strategy for the prisoners is to confess.

Although the strategy for these games seems very predictable, there is a paradox that arises. The police are also a player in this game. T


he police have evidence to put these criminals away for only X years but if the prisoners confess, then they have enough evidence to put them away for slightly more than X years. In this situation, the police want to do all they can in their power to make these criminals confess to the crime. The actions by the authorities have to be included in the outcome of the game. The way the authorities can change the outcome of the game is to penalize the prisoners if they do not do what the authorities want. Therefore the only two actions that the authority can perform are to penalize or not penalize the prisoners. However, the dominant strategy of the authority and the impact of their actions are determined by two more stipulations.

This circumstance of including the police in the game seems easily predictable and gives us the impression that the authority does not affect the game significantly. However, if we change the nature of the police, the game is altered greatly. If the police have a non-benevolent attitude, then they are no longer concerned about the status of the prisoners, rather they are concerned about the well-being of the public. In this case, the police may impose a penalty on the prisoners even if they do confess because they will be a

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Approximate Word count = 851
Approximate Pages = 3 (250 words per page double spaced)


  

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