In ultimatum bargaining games with an inactive third party, proposers make greedier offers when less information about the proposed split is revealed. Reduced information leads to higher demands from the proposer.
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Ultimatum bargaining games typically involve two players: a proposer and a responder.
The presence of an inactive third player introduces a novel dynamic to the standard bargaining model.
Information asymmetry regarding the proposed allocation can influence bargaining outcomes.
Purpose of the Study:
To investigate how information conditions affect proposer behavior in a three-player ultimatum game.
To analyze the impact of message content on the fairness of proposed resource allocation.
To determine the relationship between information revealed and proposer's demand.
Main Methods:
Experimental design simulating a three-player ultimatum bargaining scenario (Proposer X, Responder Y, Inactive Z).
Proposer X suggests an allocation (x, y, z) of a divisible resource ('cake').
Three distinct message conditions were employed: full proposal (m=(x, y, z)), responder's share (m=y), and third party's share (m=z), with information being common knowledge.
Main Results:
Proposer's offers were significantly influenced by the information condition.
A decrease in message information content correlated with an increase in the proposer's demand (x).
When only the third party's share was revealed (m=z), the modal proposal allocated nearly the entire resource to the proposer (X).
Conclusions:
Information revelation plays a critical role in shaping fairness perceptions and bargaining outcomes.
Proposers exploit information asymmetry to secure larger shares of the resource.
Responder (Y) received approximately one-third of the resource on average in conditions with more information.