Bridging Social Network Analysis and Judgment Aggregation (bibtex)
by Silvano Colombo Tosatto, Marc van Zee
Abstract:
Judgment aggregation investigates the problem of how to aggregate several individuals’ judgments on some logically connected propositions into a consistent collective judgment. The majority of work in judgment aggregation is devoted to studying impossibility results, but the relationship between the (social) dependencies that may exist between voters and the outcome of the voting process is traditionally not studied. In this paper, we use techniques from social network analysis to characterize the relations between the individuals participating in a judgment aggregation problem by analysing the similarity between their judgments in terms of social networks. We obtain a correspondence between a voting rule in judgment aggregation and a centrality measure from social network analysis and we motivate our claims by an empirical analysis. We also show how large social networks can be simplified by grouping individuals with the same voting behavior.
Reference:
Bridging Social Network Analysis and Judgment Aggregation (Silvano Colombo Tosatto, Marc van Zee), In Proceedings of the 6th International Conference on Social Informatics., 2014.
Bibtex Entry:
@InProceedings{tosatto-vanzee:socinfo2014,
  Title                    = {Bridging Social Network Analysis and Judgment Aggregation},
  Author                   = {Silvano Colombo Tosatto and Marc van Zee},
  Booktitle                = {Proceedings of the 6th International Conference on Social Informatics.},
  Year                     = {2014},
  Month                    = {December},
  Abstract                 = {Judgment aggregation investigates the problem of how to aggregate several individuals’ judgments on some logically connected propositions into a consistent collective judgment. The majority of work in judgment aggregation is devoted to studying impossibility results, but the relationship between the (social) dependencies that may exist between voters and the outcome of the voting process is traditionally not studied. In this paper, we use techniques from social network analysis to characterize the relations between the individuals participating in a judgment aggregation problem by analysing the similarity between their judgments in terms of social networks. We obtain a correspondence between a voting rule in judgment aggregation and a centrality measure from social network analysis and we motivate our claims by an empirical analysis. We also show how large social networks can be simplified by grouping individuals with the same voting behavior.},
  Url                      = {http://www.marcvanzee.nl/publications/2014/socinfo2014_bridging_social_network_analysis_and_judgment_aggregation.pdf}
}