An ordinal preference domain is a subset of preference orders that the voters are allowed to cast in an election. We introduce and study the notion of outer diversity of a domain and evaluate its value for a number of well-known structured domains, such as the single-peaked, single-crossing, group-separable, and Euclidean ones.

翻译：序数偏好域是选举中选民可投选票的偏好序子集。我们提出并研究了域的外多样性概念，并针对若干经典结构化域（如单峰域、单交叉域、群可分离域和欧几里得域）评估了其取值。