Treatment Evaluation at the Intensive and Extensive Margins

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Tác giả: Phillip Heiler, Asbjørn Kaufmann, Bezirgen Veliyev

Ngôn ngữ: eng

Ký hiệu phân loại: 152.8 Threshold, discrimination, reaction-time studies

Thông tin xuất bản: 2024

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Bộ sưu tập: Metadata

ID: 205439

This paper provides a solution to the evaluation of treatment effects in selective samples when neither instruments nor parametric assumptions are available. We provide sharp bounds for average treatment effects under a conditional monotonicity assumption for all principal strata, i.e. units characterizing the complete intensive and extensive margins. Most importantly, we allow for a large share of units whose selection is indifferent to treatment, e.g. due to non-compliance. The existence of such a population is crucially tied to the regularity of sharp population bounds and thus conventional asymptotic inference for methods such as Lee bounds can be misleading. It can be solved using smoothed outer identification regions for inference. We provide semiparametrically efficient debiased machine learning estimators for both regular and smooth bounds that can accommodate high-dimensional covariates and flexible functional forms. Our study of active labor market policy reveals the empirical prevalence of the aforementioned indifference population and supports results from previous impact analysis under much weaker assumptions.
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