Chance-Corrected Measures of Foreign Policy Similarity (FPSIM Version 2)

The FPSIM dataset provides measures of foreign policy similarity of dyads based on alliance ties (Correlates of War, version 4.1) and UN General Assembly voting (Voeten, version 17) for all members of the international system (Correlates of War system membership list, version 5.0). The alliance data cover the time period from 1816 to 2012, and the UN voting data from 1946 to 2015. The similarity measures include various versions of Ritter and Signorino's S (weighted/non-weighted by material capabilities; squared/absolute distance metrics) as well as the chance-corrected measures Cohen's Kappa and Scott's Pi. The measures based on alliance data come in two versions: one is based on valued alliance ties and the other is based on binary alliance ties.

FPSIM数据集（FPSIM dataset）为国际体系所有成员国（战争相关性项目体系成员国列表，版本5.0，Correlates of War system membership list, version 5.0）提供双边国家对的外交政策相似度测算值，测算依据包括同盟关系数据（战争相关性项目，版本4.1，Correlates of War, version 4.1）与联合国大会投票数据（Voeten，版本17）。同盟数据的时间跨度为1816年至2012年，联合国投票数据的时间跨度则为1946年至2015年。该数据集的相似度测算指标涵盖Ritter与Signorino提出的S值的多种变体（按物质能力加权/未加权、采用平方距离/绝对距离作为度量方式），以及经机会校正的科恩κ系数（Cohen's Kappa）与斯科特π系数（Scott's Pi）。基于同盟数据的测算指标分为两类：一类基于赋值同盟关系，另一类基于二值化同盟关系。