Measuring Diversity of Preferences in a Group
Vahid Hashemi, Ulle Endriss

Abstract:
We introduce a general framework for measuring the degree 
of diversity in the preferences held by the members of a group. 
We formalise and investigate three specific approaches within 
that framework: diversity as the range of distinct views held, 
diversity as aggregate distance between individual views, and 
diversity as distance of the group's views to a single compromise 
view. While similarly attractive from an intuitive point of view, 
the three approaches display significant differences when 
analysed using both the axiomatic method and empirical studies.