Communication and the emergence of a unidimensional world,
通过实验验证了固定网络下意见更新模型对一维性的预测，并发现即使网络随时间变化，一维性也可能出现。
Abstract While individuals hold, exchange, and update opinions over multiple issues, these opinions are often correlated, and a unidimensional spectrum is enough to summarize them. But when should one expect opinions to be unidimensional? And how important is the underlying structure of communication? Our experimental results, validate the crisp predictions by DeMarzo et al. (2003) when individuals update their opinions on a fixed network, always trusting the same neighbors, and confirm the importance of the communication structure in predicting whether individuals hold relatively moderate or extreme opinions. We also provide a theoretical result, simulation results, and experimental evidence suggesting that unidimensionality may arise even when individuals’ networks vary over time.