aggregation operators (aos) have been studied by many schol- ars. as many aos are proposed, there is still lacking approach to classify the categories of ao, and to select the appropriate ao within the ao candidates. in this research, each ao can be regarded as a cognitive style or individual dierence. a cognitive style and aggregation operator (csao) model is pro- posed to analyze the mapping ...

When a group of investors with dispersed private information jointly invest in risky project, how should they divide the project's profit? We show that simple contract dividing profits proportion to investors' risk tolerances may facilitate aggregation by altering risk-taking incentives when decide on investment strategies respond information. Our results provide contracting-based approach for ...

In this paper, we investigate the multiple attribute decision making (MADM) problem based on the arithmetic and geometric aggregation operators with hesitant fuzzy linguistic information. Then, motivated by the idea of traditional arithmetic operation, we have developed some aggregation operators for aggregating hesitant fuzzy linguistic information: hesitant fuzzy linguistic weighted average (...

The modern Condorcet jury theorem states that under weak conditions, when voters have common interests, elections will aggregate information the population is large, in any equilibrium. Here, we study performance of large with uncertainty. We find holds if and only expected number independent state. If depends on state, then additional equilibria exist which not aggregated. main driving force t...

A majority of truth-seeking voters wants to choose the alternative that better matches state world, but may disagree on which is best match due private information. When we have an arbitrary number alternatives and sophisticated partisan exist in electorate, electing correct challenging. We show multi-round runoff voting achieves asymptotically full-information equivalence. That is, when societ...

We study when equilibrium prices can aggregate information in an auction market with a large population of traders. Our main result identifies property information—the betweenness property—that is both necessary and sufficient for aggregation. The characterization provides novel predictions about complex, multidimensional environments.