The effectiveness and costs of nonpharmaceutical interventions for COVID-19 containment: A border discontinuous difference-in-difference approach.

China Econ Rev · 2022 · PMC9367213 · PMID 35971424

Europe PMC DOI

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a decreasing trendno p-value reported

A decreasing trend was observed at 21 days post-implementation (Panel C).

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marginally significantno p-value reported

The spillover effects of the party secretary's connections on the stringency of contact tracing in neighboring cities are also marginally significant.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.