We investigated whether higher rates of random drug testing lower substance use among people who are incarcerated and improve prison safety. To answer this question, we estimated linear panel two-way fixed effects models using naturally varying monthly rates of random drug testing across all Pennsylvania state prisons over a 45-month period during 2016–2019. Overall, we find that the testing rate is not related to any of the variables we consider, including our key measure of interest, positive drug tests.

中文翻译：

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监狱中的随机药物测试：一点点测试会有很长的路要走吗？

我们调查了较高的随机药物检测率是否会降低被监禁者的物质使用并改善监狱安全。为了回答这个问题，我们在 2016 年至 2019 年的 45 个月内，使用宾夕法尼亚州所有监狱的随机药物测试月率自然变化来估计线性面板双向固定效应模型。总体而言，我们发现检测率与我们考虑的任何变量都无关，包括我们感兴趣的关键指标，阳性药物检测。