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Ryoya Nakano

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Preprint Oct 2026

Inference after data-driven control-unit selection in difference-in-differences with estimated covariance

In difference-in-differences (DiD), researchers may use pre-treatment trends to select a control group for which the parallel-trends assumption appears plausible, with the aim of estimating the average treatment effect on the treated (ATT). Our earlier paper,Nakano and Hoshino (2016), and the present paper jointly prov...

Ryoya Nakano, Takahiro Hoshino · 0 citations

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