Preregistered experiment on EU decision-making and the Russian invasion of Ukraine

This is a pre-analysis plan for an experiment, carried out by YouGov on behalf of a team based at the European University Institute, Florence (IT). The experiment is part of a survey that will be administered to respondents in 5 EU countries. The survey experiment aims to test support of the public opinion for different types of decision making rules and levels in the EU in the wake of the Russian invasion of Ukraine.

本文件为某实验的预分析方案，该实验由位于意大利佛罗伦萨的欧洲大学研究所（European University Institute）的团队委托YouGov（舆观调查公司）执行。本实验是一项将面向5个欧盟（EU）国家受访者开展的调查的组成部分，旨在检验俄乌冲突爆发后，公众对欧盟不同类型决策规则与决策层级的支持度。