Collaborative Research on Extending the Peace Research Program

这个项目的重点是一个广泛的问题，为什么民主国家很少互相争斗，甚至把敌对行动升级到军事对抗的地步。 该项目为正在进行的研究计划增加了三个方面。 首先，它将数据收集的时间段从1885年延长到1992年，而不是1945年到1992年。 这使得PI能够复制他们在不同历史时期的早期工作。 其次，该项目进一步开发了一个预期的效用框架，用于建模国家何时可能开战。 最后，PI提供了新的分析模型与联立方程，以梳理出属于国际组织的影响。

This project focuses on the broad question of why democracies rarely fight one another or even escalate hostilities to the point of military confrontation. The project adds three facets to an ongoing research program. First it extends the time period for data collection from 1885 to 1992 rather than 1945 to 1992. This allows the PIs to replicate their earlier work in different historical periods. Second the project further develops an expected utility framework for modeling when nations might go to war. Finally the PIs provide new analysis modeled with simultaneous equations in order to tease out the impact of belonging to international organizations.