At the end of 2018, Obama-era disciplinary guidance aimed at reducing the use of suspensions in schools (especially for minorities and students with disabilities) was revoked by the U.S. Department of Education. A key piece of research supporting the decision was based on the analyses of the Early Childhood Longitudinal Study, Kindergarten Class of 1998–1999 (ECLS-K), which showed that the racial suspension gap was not really about race but resulted from the differential behavior exhibited by Black and White students. We reanalyzed the public-use ECLS-K and provide syntax for our analyses to show that the findings were primarily due to sample selection bias. Several alternative model specifications were tested and continued to show the persistence of the race-based suspension gaps regardless of model or measure used.

中文翻译：

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先前的问题行为不能解释种族暂停差距

2018 年底，美国教育部撤销了奥巴马时代旨在减少学校停课（特别是针对少数民族和残疾学生）的纪律指导。支持该决定的一项关键研究是基于对 1998-1999 年幼儿园班级早期儿童纵向研究 (ECLS-K) 的分析，该分析表明种族悬殊差距并非真正与种族有关，而是由不同的行为造成的黑人和白人学生展出。我们重新分析了公共使用的 ECLS-K，并为我们的分析提供了语法，以表明这些发现主要是由于样本选择偏差造成的。测试了几种替代模型规格，并继续显示基于种族的悬架间隙的持久性，无论使用何种模型或措施。