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. 2019 Jul 23;19:512. doi: 10.1186/s12913-019-4357-x

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© The Author(s). 2019

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 5 — Graphical results of the placebo tests for Inpatient care. Legend: left panel: placebo effects: Zhenjiang VS. control cities; right panel: histogram for placebo effects. The histogram summarized the distribution of estimated placebo effects for control cities. The dashed lines indicate the estimated mean reform effect for Zhenjiang and its opposite value