When the article “Private protection and public policing, Hickey et al., 2021” was published online the funding statement “This work was supported by French National Research Agency grants ANR-18-CE41-0003 and ANR-17-EURE-0020” was not included and the affiliation of Tanguy van Ypersele should have read: Aix-Marseille University (Aix Marseille School of Economics) CNRS, EHESS, Centrale Marseille, Aix-en-Provence, France.

The online version has been updated on 11 February 2021 to include all changes.

We apologize for these errors.

当文章“Private protection and public policing, Hickey et al., 2021 ”在线发表时，资助声明“这项工作得到了法国国家研究机构拨款 ANR-18-CE41-0003 和 ANR-17-EURE-0020 的支持”不包括在内，并且 Tanguy van Ypersele 的隶属关系应为：Aix-Marseille University（Aix Marseille School of Economics） CNRS, EHESS, Centrale Marseille, Aix-en-Provence, France。

在线版本已于 2021 年 2 月 11 日更新，以包含所有更改。

对于这些错误，我们深表歉意。