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Rather than utilizing surveys, I link together individual-level government databases from before and after 9\/11, and I measure the changes in the affected populations relative to similar populations that did not lose a relative or neighbor. The method I outline may prove useful in future studies of human behavior.<\/jats:p>","DOI":"10.1073\/pnas.1315043110","type":"journal-article","created":{"date-parts":[[2013,12,10]],"date-time":"2013-12-10T00:11:29Z","timestamp":1386634289000},"page":"20959-20963","update-policy":"https:\/\/doi.org\/10.1073\/pnas.cm10313","source":"Crossref","is-referenced-by-count":63,"title":["Long-term effect of September 11 on the political behavior of victims\u2019 families and neighbors"],"prefix":"10.1073","volume":"110","author":[{"given":"Eitan D.","family":"Hersh","sequence":"first","affiliation":[{"name":"Department of Political Science and Institution for Social and Policy Studies, Yale University, New Haven, CT 06520-8209"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"341","published-online":{"date-parts":[[2013,12,9]]},"reference":[{"key":"e_1_3_4_1_2","doi-asserted-by":"crossref","first-page":"1507","DOI":"10.1056\/NEJM200111153452024","article-title":"A national survey of stress reactions after the September 11, 2001, terrorist attacks","volume":"345","author":"Schuster MA","year":"2001","unstructured":"MA Schuster, et al., A national survey of stress reactions after the September 11, 2001, terrorist attacks. 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