500 likes | 952 Views
Contents. Prisoners' dilemma and the problem of the commons:Basic concepts in game theoryNegotiation analysisAid for co-operationExample of the methods in negotiation analysis:Jointly improving direction method. Prisoners' dilemma. Two friends, Harold and William, are suspected of committing a
E N D
1. Introduction to game theory and negotiation Ville Koskinen
Raimo P Hämäläinen
Systems Analysis Laboratory
Helsinki University of Technology
2. Contents Prisoners’ dilemma and the problem of the commons:
Basic concepts in game theory
Negotiation analysis
Aid for co-operation
Example of the methods in negotiation analysis:
Jointly improving direction method
3. Prisoners’ dilemma Two friends, Harold and William, are suspected of committing a crime
They are separated
They are unable to communicate and act co-operatively
They may take two actions:
to confess or not to confess the crime
4. Consequences Neither of them confesses
Both of them will be convicted of a minor offence and sentenced to 1 month in jail
Both of them confess
They will be sentenced to jail for 6 months
Only one of them confesses
The confessor acts as a witness against the other
The confessor will be freed
The other will be sentenced to 9 months in jail
5. Representation as a game Players: Harold and William
Strategy for each player, to confess (c) or not to confess (nc):
s1?S1={c,nc} and s2?S2= {c,nc}
1 refers to Harold and 2 refers to William
The payoff for each player:
Number of months in prison + negative sign, denoted by ui(s1,s2), i?{1,2}
6. Best response strategies William’s best response strategy is c, if Harold chooses nc c, if Harold chooses c Likewise, Harold’s best response is c independently of William’s choice