Quantile Treatment Effects in High Dimensional Panel Data

Yihong Xu and Li Zheng

Papers from arXiv.org

Abstract: We introduce a novel estimator for quantile causal effects with high-dimensional panel data (large $N$ and $T$), where only one or a few units are affected by the intervention or policy. Our method extends the generalized synthetic control method (Xu 2017) from average treatment effect on the treated to quantile treatment effect on the treated, allowing the underlying factor structure to change across the quantile of the interested outcome distribution. Our method involves estimating the quantile-dependent factors using the control group, followed by a quantile regression to estimate the quantile treatment effect using the treated units. We establish the asymptotic properties of our estimator and propose a bootstrap procedure for statistical inference, supported by simulation studies. An empirical application of the 2008 China Stimulus Program is provided.

Date: 2025-04
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