creativecommons.org/licenses/by-nc/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com David Dutwin is executive vice president and chief methodologist for SSRS in Glen Mills, PA, USA, and senior fellow/lecturer at the Program for Opinion Research and Election Studies at the University of Pennsylvania, Philadelphia, PA, USA. This article represents the author’s presidential address delivered at the 74th Annual Conference of the American Association for Public Opinion Research in Toronto, ON, Canada, on May 17, 2019. *Address correspondence to David Dutwin, SSRS, 1 Braxton Way, Suite 125, Glen Mills, PA 19342, USA; e-mail: ddutwin@ssrs.com.

中文翻译：

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总统致辞：民意研究倡导的必要性

creativecommons.org/licenses/by-nc/4.0/)，它允许在任何媒体中进行非商业性的重复使用、分发和复制，前提是原始作品被正确引用。如需商业再利用，请联系 journals.permissions@oup.com David Dutwin 是美国宾夕法尼亚州格伦米尔斯 SSRS 的执行副总裁兼首席方法学家，也是美国宾夕法尼亚大学民意研究和选举研究计划的高级研究员/讲师。美国宾夕法尼亚州费城宾夕法尼亚大学。本文代表作者于 2019 年 5 月 17 日在加拿大安大略省多伦多举行的美国公众舆论研究协会第 74 届年会上发表的主席讲话。 *致信给大卫杜特温，SSRS，1 Braxton Way, Suite 125，格伦米尔斯，PA 19342，美国；电子邮件：ddutwin@ssrs.com。