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. 2021 Oct 14;11:20495. doi: 10.1038/s41598-021-99368-9

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© The Author(s) 2021

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Lagging effect in the wave-specific analysis. Variation of coefficients and p values of policies and indices in the first wave analysis is shown. The size and transparency of the points increase with a time lag (0, 3, 7, 10, 14). (a) first wave analysis shows C2, C4, C7, H4, SI, and RI were significant at all-time lags while C8 and E3 were with lagging only. (b) second wave analysis shows C1, C5, C6, E3, H1, H3, HI, CI and CoI are significant at all-time lags while C8 at 14 days’ lag.