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Trends in Self-Reporting of Marijuana Consumption in the United States 美国大麻消费自我报告趋势
IF 1.6 Q2 SOCIAL SCIENCES, MATHEMATICAL METHODS Pub Date : 2018-01-01 DOI: 10.1080/2330443X.2018.1513346
Maria Cuellar
ABSTRACT To adjust for underreporting of marijuana use, researchers multiply the proportion of individuals who reported using marijuana by a constant factor, such as the US Office of National Drug Control Policy’s 1.3. Although the current adjustments are simple, they do not account for changes in reporting over time. This article presents a novel way to explore relative changes in reporting from one survey to another simply by using data already available in a self-reported survey, the National Survey on Drug Use and Health. Using domain estimation to examine the stability in reported marijuana use by age 25 in individuals older than 25, this analysis provides estimates of the trends in marijuana reporting and standard errors, as long as the survey weights properly account for sampling variability. There was no significant evidence of an upward or downward trend in reporting changes from 1979 to 2016 for all birth cohorts, although there were significant differences in reporting between years and a slight downward trend in later years. These results suggest that individuals have become increasingly less willing to report their drug use in recent years, and thus the ONDCP likely underestimated the already drastic increase in use from 1992 to 2016.
摘要为了调整大麻使用报告不足的情况,研究人员将报告使用大麻的个人比例乘以一个常数,如美国国家药物管制政策办公室的1.3。尽管目前的调整很简单,但它们并没有考虑到报告随时间的变化。这篇文章提出了一种新的方法来探索从一项调查到另一项调查的报告的相对变化,只需使用自我报告调查中已有的数据,即全国药物使用和健康调查。该分析使用领域估计来检查25岁以上人群在25岁之前报告的大麻使用情况的稳定性,只要调查权重适当考虑到抽样变异性,就可以估计大麻报告的趋势和标准误差。没有显著证据表明,从1979年到2016年,所有出生队列的报告变化都呈上升或下降趋势,尽管年份之间的报告存在显著差异,后期略有下降趋势。这些结果表明,近年来,个人越来越不愿意报告自己的药物使用情况,因此ONDCP可能低估了1992年至2016年已经急剧增加的使用情况。
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引用次数: 2
How do Test Scores at the Ceiling Affect Value-Added Estimates? 最高测试分数如何影响增值估计?
IF 1.6 Q2 SOCIAL SCIENCES, MATHEMATICAL METHODS Pub Date : 2018-01-01 DOI: 10.1080/2330443X.2018.1460226
Alexandra M. Resch, Eric Isenberg
ABSTRACT Some educators are concerned that students with test scores at top of the test score distribution will negatively affect the value-added estimates of teachers of those students. A conventional wisdom has sprung up suggesting that students with very high test scores have “no room to grow,” so value-added estimates for teachers with high-performing students will be depressed even for highly effective teachers. Using empirical data, we show that under normal circumstances, in which few students score at the ceiling, a teacher of high-performing students—even with many students scoring at the ceiling on the pre-test—can have a high value-added estimate. To understand how more extreme ceiling effects can change value-added estimates, we simulate a low ceiling, causing student test achievement data of high-scoring students to become less precise when a single score represents a large range of possible achievement. We find that the problem of test score ceilings for an evaluation system is not that it pushes the value added of every teacher of high-achieving students toward the bottom of the distribution of teachers, but rather shrinks it toward the middle.
摘要一些教育工作者担心,考试成绩在考试成绩分布中名列前茅的学生会对教师对这些学生的增值估计产生负面影响。一种传统观点认为,考试成绩很高的学生“没有成长的空间”,因此,即使是高效的教师,对成绩优异的教师的增值估计也会降低。使用实证数据,我们表明,在很少有学生达到最高分数的正常情况下,一个表现优异的学生的老师——即使有很多学生在预考中达到了最高分数——也可以做出高附加值的估计。为了了解更极端的上限效应如何改变增值估计,我们模拟了一个低上限,当一个分数代表一个大范围的可能成绩时,导致高分学生的学生测试成绩数据变得不那么精确。我们发现,评估系统的考试分数上限问题并不在于它将每一位成绩优异的学生的教师的附加值推向教师分布的底部,而是将其缩小到中间。
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引用次数: 8
Accumulating Evidence of the Impact of Voter ID Laws: Student Engagement in the Political Process 选民身份法影响的证据积累:政治过程中的学生参与
IF 1.6 Q2 SOCIAL SCIENCES, MATHEMATICAL METHODS Pub Date : 2017-11-29 DOI: 10.1080/2330443X.2017.1407721
K. McConville, Lynne Stokes, M. Gray
ABSTRACT Recently, voter ID laws have been instituted, modified, or overturned in many states in the U.S. As these laws change, it is important to have accurate measures of their impact. We present the data collection methods and results of class projects that attempted to quantify the impact of the voter ID laws in areas of three states. We also summarize the types of data used to assess the impact of voter ID laws and discuss how our data address some of the shortcomings of the usual techniques for assessing the impact of voter ID laws.
最近,美国许多州都制定、修改或推翻了选民身份法。随着这些法律的变化,准确衡量其影响是很重要的。我们提出了数据收集方法和班级项目的结果,试图量化选民身份法在三个州的地区的影响。我们还总结了用于评估选民身份法影响的数据类型,并讨论了我们的数据如何解决评估选民身份法影响的常用技术的一些缺点。
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引用次数: 4
A Spatial Study of the Location of Superfund Sites and Associated Cancer Risk 超级基金地点和癌症相关风险的空间研究
IF 1.6 Q2 SOCIAL SCIENCES, MATHEMATICAL METHODS Pub Date : 2017-11-29 DOI: 10.1080/2330443X.2017.1408439
R. Amin, Arlene Nelson, S. McDougall
ABSTRACT Superfund sites are geographic locations selected by the U.S. Environmental Protection Agency as having extreme toxic chemical spills. In this article, we address three main research questions: (1) Are there geographical areas where the number (or density) of Superfund sites is significantly higher than in the rest of the USA? (2) Is there an association between cancer incidence and the number (or density) of Superfund sites? (3) Do counties with Superfund sites have higher proportions of minority populations than the rest of the USA? We study the geographic distribution of the overall cancer incidence rate (2007–2011) in addition to the geographic variation of Superfund sites for 2013. We used the disease surveillance software package SaTScan with its scan statistic to identify locations and relative risks of spatial clusters in cancer rates and in Superfund site count and density. We also used the surveillance software FlexScan to support and complement the results obtained with SaTScan. We find that geographic areas with Superfund sites tend to have elevated cancer risk, and also elevated proportions of minority populations.
超级基金地点是由美国环境保护署选定的具有极端有毒化学物质泄漏的地理位置。在这篇文章中,我们解决了三个主要的研究问题:(1)是否存在超级基金站点的数量(或密度)明显高于美国其他地区的地理区域?(2)癌症发病率与超级基金站点的数量(或密度)之间是否存在关联?(3)拥有超级基金站点的县的少数民族人口比例是否高于美国其他地区?除了2013年超级基金站点的地理变化外,我们还研究了2007-2011年总体癌症发病率的地理分布。我们使用疾病监测软件包SaTScan及其扫描统计数据来确定癌症发病率和超级基金站点数量和密度的空间集群的位置和相对风险。我们还使用监测软件FlexScan来支持和补充SaTScan获得的结果。我们发现,拥有超级基金站点的地理区域患癌症的风险更高,少数民族人口的比例也更高。
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引用次数: 14
On the Distribution of Worker Productivity: The Case of Teacher Effectiveness and Student Achievement 论工人生产力的分布——以教师效能与学生成就为例
IF 1.6 Q2 SOCIAL SCIENCES, MATHEMATICAL METHODS Pub Date : 2017-01-01 DOI: 10.1080/2330443X.2016.1271733
Dan Goldhaber, R. Startz
ABSTRACT It is common to assume that worker productivity is normally distributed, but this assumption is rarely, if ever, tested. We estimate the distribution of worker productivity, where individual productivity is measured with error, using the productivity of teachers as an example. We employ a nonparametric density estimator that explicitly accounts for measurement error using data from the Tennessee STAR experiment, and longitudinal data from North Carolina and Washington. Statistical tests show that the productivity distribution of teachers is not Gaussian, but the differences from the normal distribution tend to be small. Our findings confirm the existing empirical evidence that the differences in the effects of individual teachers on student achievement are large and the assumption that the differences in the upper and lower tails of the teacher performance distribution are far larger than in the middle of the distribution. Specifically, a 10 percentile point movement for teachers at the top (90th) or bottom (10th) deciles of the distribution is estimated to move student achievement by 8–17 student percentile ranks, as compared to a change of 2–7 student percentile ranks for a 10 percentile change in teacher productivity in the middle of the distribution.
摘要:人们通常认为工人生产力是正态分布的,但这种假设很少得到检验。我们以教师的生产力为例,估计了工人生产力的分布,其中个人生产力是有误差的。我们使用非参数密度估计器,该估计器使用来自田纳西州STAR实验的数据以及来自北卡罗来纳州和华盛顿州的纵向数据来明确说明测量误差。统计检验表明,教师的生产力分布不是高斯分布,但与正态分布的差异往往较小。我们的研究结果证实了现有的经验证据,即教师个体对学生成绩的影响差异很大,以及教师成绩分布的上尾部和下尾部的差异远大于分布中间部分的差异的假设。具体而言,与分布中间教师生产力变化10%的学生百分比排名2–7相比,分布最靠前(第90位)或最靠后(第10位)的教师的10个百分点的变化估计会使学生成绩移动8–17个学生百分比排名。
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引用次数: 8
Defining Program Effects: A Distribution-Based Perspective 定义程序效果:基于分布的视角
IF 1.6 Q2 SOCIAL SCIENCES, MATHEMATICAL METHODS Pub Date : 2017-01-01 DOI: 10.1080/2330443X.2017.1369914
J. Green, W. Stroup, Pamela S. Fellers
ABSTRACT In an age of accountability, it is critical to define and estimate the effects of teacher education and professional development programs on student learning in ways that allow stakeholders to explore potential reasons for what is observed and to enhance program quality and fidelity. Across the suite of statistical models used for program evaluation, researchers consistently measure program effectiveness using the coefficients of fixed program effects. We propose that program effects are best characterized not as a single effect to be estimated, but as a distribution of teacher-specific effects. In this article, we first discuss this approach and then describe one way it could be used to define and estimate program effects within a value-added modeling context. Using an example dataset, we demonstrate how program effect estimates can be obtained using the proposed methodology and explain how distributions of these estimates provide additional information and insights about programs that are not apparent when only looking at average effects. By examining distributions of teacher-specific effects as proposed, researchers have the opportunity to more deeply investigate and understand the effects of programs on student success.
在一个问责制时代,定义和评估教师教育和专业发展项目对学生学习的影响至关重要,这种方式允许利益相关者探索观察到的潜在原因,并提高项目的质量和保真度。在用于项目评估的统计模型套件中,研究人员始终使用固定项目效果的系数来衡量项目的有效性。我们认为,项目效应最好不是作为一个单一的效应来估计,而是作为教师特定效应的分布。在本文中,我们首先讨论这种方法,然后描述一种在增值建模上下文中用于定义和评估程序效果的方法。使用一个示例数据集,我们演示了如何使用所提出的方法获得项目效果估计,并解释了这些估计的分布如何提供有关项目的额外信息和见解,这些信息和见解仅在查看平均效果时是不明显的。通过检查教师特定效应的分布,研究人员有机会更深入地调查和理解项目对学生成功的影响。
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引用次数: 0
Absence of Statistical and Scientific Ethos: The Common Denominator in Deficient Forensic Practices 统计和科学伦理的缺失:司法实践不足的共同污点
IF 1.6 Q2 SOCIAL SCIENCES, MATHEMATICAL METHODS Pub Date : 2017-01-01 DOI: 10.1080/2330443X.2016.1270175
W. Tobin, H. Sheets, C. Spiegelman
ABSTRACT Comparative Bullet Lead Analysis (CBLA) was discredited as a forensic discipline largely due to the absence of cross-discipline input, primarily metallurgical and statistical, during development and forensic/judicial application of the practice. Of particular significance to the eventual demise of CBLA practice was ignorance of the role of statistics in assessing probative value of claimed bullet “matches” at both the production and retail distribution levels, leading to overstated testimonial claims by expert witnesses. Bitemark comparisons have come under substantial criticism in the last few years, both due to exonerations based on DNA evidence and to research efforts questioning the claimed uniqueness of bitemarks. The fields of fire and arson investigation and of firearm and toolmark comparison are similar to CBLA and bitemarks in the absence of effective statistical support for these practices. The features of the first two disciplines are examined in systemic detail to enhance understanding as to why they became discredited forensic practices, and to identify aspects of the second two disciplines that pose significant concern to critics.
摘要:子弹铅对比分析(CBLA)作为一门法医学学科受到质疑,主要是因为在该实践的发展和法医/司法应用过程中缺乏跨学科的投入,主要是冶金和统计。对CBLA实践的最终消亡具有特别重要意义的是,忽视了统计数据在评估生产和零售分销层面上声称的子弹“火柴”的证明价值方面的作用,导致专家证人夸大了证词。在过去的几年里,比特标记的比较受到了大量的批评,这既是因为基于DNA证据的免责,也是因为研究工作质疑比特标记的独特性。火灾和纵火调查以及枪支和工具标记比较领域类似于CBLA和bitemarks,因为这些做法缺乏有效的统计支持。对前两个学科的特征进行了系统详细的研究,以加深对它们为什么成为不可信的法医实践的理解,并确定后两个学科中引起批评者严重关注的方面。
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引用次数: 1
Response to Gelman and Azari (2017) 对Gelman和Azari的回应(2017)
IF 1.6 Q2 SOCIAL SCIENCES, MATHEMATICAL METHODS Pub Date : 2017-01-01 DOI: 10.1080/2330443X.2017.1399845
Corrie V. Hunt
As Gelman and Azari make clear, there is no single smoking gun to point to as the primary explanation for the 2016 election that took somany of us by surprise. As a pollster at a progressive public opinion research firm, I will admit the election floored me in the most depressing and sickening of ways. It was not because I did not think it was possible. In fact, in the final weeks leading up to the election, I and many of my colleagues grew increasingly fearful that the tightening we saw in internal polls meant that aClinton victorywas far from certain. But I letmyself be reassured by the confidence of the analytics projections. One of the most important lessons practitioners and consumers of public opinion research can learn from this experience is to take a much closer examination of election prediction models (lesson #3) and how nonresponse bias (lesson #5) affects polls in general and the polls that feed into forecast models. And finally, we cannot let ourselves get so fixated on the horserace numbers that we forget to listen to what voters are actually telling us in the rest of the poll and in qualitative research.
正如格尔曼和阿扎里明确指出的那样,没有确凿的证据可以用来解释2016年那场令我们许多人感到意外的大选。作为一家进步的民意调查公司的民意调查员,我承认这次选举以最令人沮丧和恶心的方式击败了我。这并不是因为我认为这是不可能的。事实上,在大选前的最后几周,我和我的许多同事越来越担心,我们在内部民意调查中看到的紧缩意味着克林顿的胜利远非确定无疑。但我对分析预测的信心感到放心。民意调查的从业者和消费者可以从这一经验中学到的最重要的教训之一是,更仔细地检查选举预测模型(教训3),以及无反应偏见(教训5)如何影响民意调查和为预测模型提供信息的民意调查。最后,我们不能让自己过于关注赛马数据,而忘记倾听选民在其余的民意调查和定性研究中真正告诉我们的东西。
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引用次数: 0
ADGN: An Algorithm for Record Linkage Using Address, Date of Birth, Gender, and Name ADGN:一种使用地址、出生日期、性别和姓名进行记录链接的算法
IF 1.6 Q2 SOCIAL SCIENCES, MATHEMATICAL METHODS Pub Date : 2017-01-01 DOI: 10.1080/2330443X.2017.1389620
S. Ansolabehere, Eitan Hersh
ABSTRACT This article presents an algorithm for record linkage that uses multiple indicators derived from combinations of fields commonly found in databases. Specifically, the quadruplet of Address (A), Date of Birth (D), Gender (G), and Name (N) and any triplet of A-D-G-N (i.e., ADG, ADN, AGN, and DGN) also link records with an extremely high likelihood. Matching on multiple identifiers avoids problems of missing data, inconsistent fields, and typographical errors. We show, using a very large database from the State of Texas, that exact matches using combinations A, D, G, and N produce a rate of matches comparable to 9-Digit Social Security Number. Further examination of the linkage rates show that reporting of the data at a higher level of aggregation, such as Birth Year instead of Date of Birth and omission of names, makes correct matches between databases highly unlikely, protecting an individual’s records.
本文提出了一种记录链接算法,该算法使用从数据库中常见的字段组合派生的多个指标。具体来说,地址(A)、出生日期(D)、性别(G)和姓名(N)的四联体以及A-D-G-N的任何三联体(即ADG、ADN、AGN和DGN)也极有可能将记录联系起来。对多个标识符进行匹配可以避免数据丢失、字段不一致和排版错误等问题。通过使用来自德克萨斯州的一个非常大的数据库,我们展示了使用组合a、D、G和N进行精确匹配所产生的匹配率与9位社会安全号码相当。对链接率的进一步检查表明,在更高的聚合级别上报告数据,例如用出生年份代替出生日期和遗漏姓名,使数据库之间的正确匹配极不可能,从而保护了个人的记录。
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引用次数: 37
Unraveling 2016: Comments on Gelman and Azari's 19 Things 揭开2016:盖尔曼和阿扎尔的19件事评论
IF 1.6 Q2 SOCIAL SCIENCES, MATHEMATICAL METHODS Pub Date : 2017-01-01 DOI: 10.1080/2330443X.2017.1399846
J. Victor
Scholars, pundits, and wonks will be studying the 2016 election for a long time. The sheer number of unprecedented elements of the 2016 U.S. elections produced some shock fatigue and left even seasoned election watchers scratching their heads (Fallows 2017). Drawing on insights from data science, statistics, and political science, Julia Azari and Andrew Gelman identify an impressive 19 potentially productive threads to pull on in our attempt to unravel the mysteries of 2016. There are so many features of the 2016 election that strayed from the status quo that, like a spoiled experimental design, it is challenging for scholars to explain exactly why the election turned in the surprising ways it did. To name just a few, 2016 included the first female major party candidate, the first modern election with evidence of undue foreign influence, the first election with a nominee who had no government or military experience of any kind, and the list goes on. While some may find the Gelman–Azari treatment dissatisfying for being too shallow on any individual point, too contrived, or just too long of a list, I submit that their holistic approach to breaking down the oddities of 2016 is necessary given the circumstances. Here, I focus on four of the items on their list—two that I find worth underscoring and strongly worthy of further exploration, and two that are perhaps too complex to pursue, even if perfectly valid.
学者、专家和专家们将对2016年大选进行长期研究。2016年美国大选中前所未有的因素数量之多,让人感到震惊和疲劳,甚至让经验丰富的选举观察家也挠头(Fallows 2017)。Julia Azari和Andrew Gelman利用数据科学、统计学和政治学的见解,确定了19条令人印象深刻的潜在富有成效的线索,以帮助我们解开2016年的谜团。2016年大选有太多偏离现状的特点,就像一个被破坏的实验设计一样,学者们很难准确解释为什么大选会以令人惊讶的方式转变。仅举几个例子,2016年包括第一位主要政党的女性候选人,第一次有证据表明存在不当外国影响的现代选举,第一次由没有任何政府或军事经验的候选人参加的选举,名单还在继续。虽然有些人可能会觉得盖尔曼-阿扎里的待遇在任何一点上都太肤浅、太做作,或者只是太长了,我认为,考虑到目前的情况,他们打破2016年怪事的整体方法是必要的。在这里,我重点关注他们名单上的四个项目——其中两个我认为值得强调,非常值得进一步探索,还有两个可能过于复杂,无法追求,即使完全有效。
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引用次数: 0
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Statistics and Public Policy
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