In many countries, the law permits state authorities to detain noncitizens before deportation. Typically judicial decisions about preremoval detention must be made within a short period of time during which deportable noncitizens are held in police premises, and depending on the country detention may last just one month (e.g., France) or up to 18 months (the Netherlands). While previous research has explored various dimensions of noncitizen detention including the legal procedure, health consequences, the condition of detention centers, and the lives of deportable noncitizens, the empirical assessment of the determinants of decisions on preremoval detention are largely unexplored. Using data from court proceedings of police petitions of detention in Spain and a quantitative strategy, in this article we undertake an empirical analysis of noncitizen detention combining personal background of deportable noncitizens, legal factors of the case, and the behavior of different actors involved in the procedure. To do it, we fit models that take into account variation occurred at judicial district levels. Results indicate, on the one hand, that relevant actors involved in the procedure use different informational cues to decide on cases. On the other hand, the role of prosecutors and attorneys during hearings proves also relevant to predict detention.

中文翻译：

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穿过倾斜的草地地板：非公民被遣返前拘留的实证分析

在许多国家/地区，法律允许州当局在驱逐出境之前拘留非公民。通常，关于遣返前拘留的司法决定必须在将被遣返的非公民关押在警察局内的短时间内做出，并且取决于国家的拘留时间可能仅持续一个月（例如法国）或长达18个月（荷兰）。 。尽管先前的研究已经探究了非公民拘留的各个方面，包括法律程序，健康后果，拘留中心的状况以及可驱逐非公民的生活，但对驱逐前拘留决定的决定因素的实证评估在很大程度上尚待探索。利用来自西班牙警方拘留请愿书的法院程序数据和定量策略，在本文中，我们将对非公民拘留的个人背景，案件的法律因素以及参与该程序的不同行为者的行为进行了实证分析。为了做到这一点，我们拟合了模型，该模型考虑了在司法区域一级发生的变化。一方面，结果表明，参与程序的相关参与者使用不同的信息线索来决定案件。另一方面，事实证明，检察官和律师在听证会中的作用也与预测拘留有关。参与程序的相关参与者使用不同的信息提示来决定案件。另一方面，事实证明，检察官和律师在听证会中的作用也与预测拘留有关。参与程序的相关参与者使用不同的信息提示来决定案件。另一方面，事实证明，检察官和律师在听证会中的作用也与预测拘留有关。