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arXiv 2209.01396stat.ME
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小样本回归不连续设计:密度包含研究规模度量及其性能

Small Study Regression Discontinuity Designs: Density Inclusive Study Size Metric and Performance

Daryl Swartzentruber, Eloise Kaizar

AI总结:

针对小样本回归不连续设计,提出密度包含研究规模(DISS)度量,通过蒙特卡洛模拟和印第安纳州数据验证其优于总体样本量,并评估非参数估计方法性能。

摘要:

回归不连续(RD)设计是一种流行的准实验研究,其中处理分配取决于运行变量的值是否超过一个截断点。由于基于截断点的干预措施普遍存在,RD设计在教育应用中日益流行。在此类应用中,样本量可能相对较小,或者截断点附近可能存在稀疏性。我们提出了一种度量——密度包含研究规模(DISS),通过纳入运行变量的密度,比总体样本量更好地刻画RD研究的规模。我们在蒙特卡洛模拟研究中展示了该度量的有用性,该模拟比较了小型研究中流行的非参数RD估计方法的操作特性。我们还将DISS度量及RD估计方法应用于印第安纳州的学校问责数据。

英文摘要:

Regression discontinuity (RD) designs are popular quasi-experimental studies in which treatment assignment depends on whether the value of a running variable exceeds a cutoff. RD designs are increasingly popular in educational applications due to the prevalence of cutoff-based interventions. In such applications sample sizes can be relatively small or there may be sparsity around the cutoff. We propose a metric, density inclusive study size (DISS), that characterizes the size of an RD study better than overall sample size by incorporating the density of the running variable. We show the usefulness of this metric in a Monte Carlo simulation study that compares the operating characteristics of popular nonparametric RD estimation methods in small studies. We also apply the DISS metric and RD estimation methods to school accountability data from the state of Indiana.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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