论文标题
巨大的分歧：美国公众两极分化的驱动力
The Great Divide: Drivers of Polarization in the US Public
论文作者
论文摘要
许多民主社会在政治上变得更加两极分化，作为主要的例子。这种现象的起源仍然没有得到充分理解，也没有辩论。为了更好地了解政治两极分化的基础机制，我们开发了数学框架，并采用信息理论概念来分析1994年至2017年皮尤研究中心收集的政治两极分化的经验数据。我们的框架可以捕捉到民主和共和党倾向于美国公众的偏光的演变。我们的发现提供了经验和定量的证据，即美国的政治两极分化主要是由民主党中强大，更左倾的政策/文化创新驱动的。
Many democratic societies have become more politically polarized, with the U.S. as the main example. The origins of this phenomenon are still not well-understood and subject to debate. To better understand the mechanisms underlying political polarization, we develop a mathematical framework and employ information-theoretic concepts to analyze empirical data on political polarization that has been collected by Pew Research Center from 1994 to 2017. Our framework can capture the evolution of polarization in the Democratic- and Republican-leaning segments of the U.S. public and allows us to identify its drivers. Our findings provide empirical and quantitative evidence that political polarization in the U.S. is mainly driven by strong and more left-leaning policy/cultural innovations in the Democratic party.
