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We study social learning in a large population of agents who only observe the actions taken by their neighbours. Agents have to choose one, out of two, reversible actions, each optimal in one, out of two, unknown states of the world. Each agent chooses rationally, on the basis of private...
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and sufficient condition for convergence to consensus and characterize outcomes where the society ends up polarized. Our …
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We propose the concept of level r consensus as a useful property of a preference profile which considerably enhances … the stability of social choice. This concept involves a weakening of unanimity, the most extreme form of consensus. It is … shown that if a preference profile exhibits level r consensus around a given preference relation, the associated majority …
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a bookmaker consensus rating - obtained by aggregating winning odds from 22 online bookmakers - the clear favorite is … predicted 4.8%. Furthermore, by complementing the bookmaker consensus results with simulations of the whole tournament … "inverse" procedure of tournament simulations, yielding estimates of probabilities for all possible pairwise matches at all …
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We study a dynamic model of opinion formation in social networks. In our model, boundedly rational agents update opinions by averaging over their neighbors' expressed opinions, but may misrepresent their own opinion by conforming or counter-conforming with their neighbors. We show that an...
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We investigate the role of manipulation in a model of opinion formation. Agents repeatedly communicate with their neighbors in the social network, can exert effort to manipulate the trust of others, and update their opinions about some common issue by taking weighted averages of neighbors'...
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