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美国总统选举中的逆转:1836—2016年

Inversions in US Presidential Elections: 1836–2016
American Economic Journal: Applied Economics · 2022 · Michael Geruso、Dean Spears、Ishaana Talesara

中文摘要

逆转——即普选票获胜者输掉选举——在美国总统选举中已出现四次。本文表明,逆转并非统计上的偶然现象,而是自 19 世纪初以来在事前就具有相当的可能性。在普选票差距在 1 个百分点以内(占总统选举的八分之一)的选举中,预期约有 40% 会出现逆转。本文表明,这一条件概率在各历史时期都极为稳定——尽管参与投票的群体、存在的州以及参与的政党各不相同。本文的发现意味着,美国之所以经历的逆转如此之少,仅仅是因为选举次数如此之少(且势均力敌的选举更少)。

Abstract

Inversions-in which the popular vote winner loses the election-have occurred in four US presidential races. We show that rather than being statistical flukes, inversions have been ex ante likely since the early 1800s. In elections yielding a popular vote margin within 1 point (one-eighth of presidential elections), about 40 percent will be inversions in expectation. We show this conditional probability is remarkably stable across historical periods-despite differences in which groups voted, which states existed, and which parties participated. Our findings imply that the United States has experienced so few inversions merely because there have been so few elections (and fewer close elections).
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