{"type":"rich","url":"https://hoppingaround.hatenablog.com/entry/2010/12/21/170800","height":"190","description":"Simple formulas for standard errors that cluster by both firm and time Samuel B. Thompson (JFE 2011)","author_name":"at_sue","version":"1.0","author_url":"https://blog.hatena.ne.jp/at_sue/","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>","image_url":null,"blog_url":"https://hoppingaround.hatenablog.com/","blog_title":"hopping around","width":"100%","provider_name":"Hatena Blog","categories":["Econ"],"provider_url":"https://hatena.blog","title":"clustering","published":"2010-12-21 17:08:00"}