Measuring Group Differences in High‐Dimensional Choices: Method and Application to Congressional Speech
高维选择中的群体差异测度:方法及国会演讲应用AI 解读 ↓
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AI 根据所提供的论文材料归类:摘要研究大规模选择集合中的群体选择差异,并将国会发言作为高维选择的应用,因此与离散选择方向直接相关。
高维选择中的群体差异测度:方法及国会演讲应用AI 解读 ↓
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We study the problem of measuring group differences in choices when the dimensionality of the choice set is large. We show that standard approaches suffer from a severe finite‐sample bias, and we propose an estimator that applies recent advances in machine learning to address this bias. We apply this method to measure trends in the partisanship of congressional speech from 1873 to 2016, defining partisanship to be the ease with which an observer could infer a congressperson's party from a single utterance. Our estimates imply that partisanship is far greater in recent years than in the past, and that it increased sharply in the early 1990s after remaining low and relatively constant over the preceding century.