{"blog_title":"hopping around","description":"Simple formulas for standard errors that cluster by both firm and time Samuel B. Thompson (JFE 2011)","width":"100%","provider_url":"https://hatena.blog","image_url":null,"version":"1.0","published":"2010-12-21 17:08:00","type":"rich","height":"190","blog_url":"https://hoppingaround.hatenablog.com/","url":"https://hoppingaround.hatenablog.com/entry/2010/12/21/170800","provider_name":"Hatena Blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fhoppingaround.hatenablog.com%2Fentry%2F2010%2F12%2F21%2F170800\" title=\"clustering - hopping around\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","author_url":"https://blog.hatena.ne.jp/at_sue/","title":"clustering","author_name":"at_sue","categories":["Econ"]}