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License to Kill? The Impact of Hospital Strikes 杀人执照?医院罢工的影响
Pub Date : 2019-05-20 DOI: 10.2139/ssrn.3414532
Eduardo Costa
Hospital strikes in the Portuguese National Health Service (NHS) are becoming increasingly frequent. This paper analyses the effect of different health professionals' strikes (physicians, nurses and diagnostic and therapeutic technicians - DTT) on patients’ outcomes and hospital activity. Patient-level data, comprising all NHS hospital admissions in mainland Portugal from 2012 to 2018, is used together with a comprehensive strike dataset with almost 130 protests. Pooled OLS is employed to study the impact of strikes on health outcomes. A Hazard model is also used to analyze changes in patients' length of stay. Data suggests that hospital operations are partially disrupted during strikes, with sharp reductions in surgical admissions (up to 54%) and a decline on both inpatient and outpatient care admissions. Controlling for hospital characteristics, time and regional patterns, and differences in patients’ composition, results suggest a 6% increase in hospital mortality for patients exposed to physicians’ strikes. Urgent readmissions increase for patients exposed to nurses or DTTs' strikes. Results suggest that legal minimum staffing levels defined during strikes, particularly during physicians' strikes, fail to prevent declines in the quality of care provided.
葡萄牙国家医疗服务体系(NHS)的医院罢工越来越频繁。本文分析了不同卫生专业人员罢工(医生、护士和诊断和治疗技术人员- DTT)对患者结局和医院活动的影响。患者层面的数据包括2012年至2018年葡萄牙大陆所有NHS医院的入院情况,与包含近130起抗议活动的综合罢工数据集一起使用。综合行动方案用于研究罢工对健康结果的影响。一个危险模型也被用来分析病人住院时间的变化。数据显示,在罢工期间,医院手术部分中断,外科入院人数急剧减少(高达54%),住院和门诊住院人数均下降。控制医院特征、时间和区域模式以及患者组成的差异,结果表明,暴露于医生罢工的患者的住院死亡率增加了6%。接触护士或医护人员罢工的患者的紧急再入院人数增加。结果表明,在罢工期间,特别是在医生罢工期间,规定的法定最低人员配备水平未能防止所提供的护理质量下降。
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引用次数: 0
Inference for Factor-Augmented Forecasting Regressions with Threshold effects 具有阈值效应的因子增强预测回归的推理
Pub Date : 2019-05-17 DOI: 10.2139/ssrn.3389793
Yayi Yan, Tingting Cheng
This paper introduces a factor-augmented forecasting regression model in the presence of threshold effects. We consider least squares estimation of the regression parameters, and establish asymptotic theories for estimators of both slope coefficients and the threshold parameter. Prediction intervals are also constructed for factor-augmented forecasts. Moreover, we develop a likelihood ratio statistic for tests on the threshold parameter and a sup-Wald test statistic for tests on the presence of threshold effects, respectively. Simulation results show that the proposed estimation method and testing procedures work very well in finite samples. Finally, we demonstrate the usefulness of the proposed model through applications to forecasting stock market returns and the annual growth rate of industrial production, respectively.
本文介绍了一种存在阈值效应的因子增强预测回归模型。我们考虑了回归参数的最小二乘估计,并建立了斜率系数和阈值参数估计的渐近理论。预测区间也被构造为因子增强预测。此外,我们分别为阈值参数的检验开发了似然比统计量,为阈值效应的存在性检验开发了sup-Wald检验统计量。仿真结果表明,所提出的估计方法和测试程序在有限的样本下都能很好地工作。最后,我们通过分别预测股票市场收益和工业生产年增长率来证明该模型的有效性。
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引用次数: 0
Beyond Calories: The New Economics of Nutrition 超越卡路里:营养学的新经济学
Pub Date : 2019-03-31 DOI: 10.1146/ANNUREV-RESOURCE-100518-094053
Amelia B. Finaret, W. Masters
The economics of human nutrition has changed greatly in recent years as researchers have moved beyond supply and demand of specific foods and total calories to functional aspects of diet quality, such as nutrient composition, sustainability, and a variety of credence attributes. New kinds of data and methods allow researchers to focus on beneficial or harmful attributes of dietary patterns and the cost-effectiveness of interventions aimed at improving health through diet. This review describes some of the recent literature in nutrition economics and its implications for food policy around the world. The new economics of nutrition is benefiting from a strong foundation in the behavioral and social sciences, building on evidence from the natural and health sciences to address fundamental aspects of human well-being and sustainable development.
近年来,随着研究人员从特定食物的供需和总热量转向饮食质量的功能方面,如营养成分、可持续性和各种可信度属性,人类营养经济学发生了巨大变化。新的数据和方法使研究人员能够关注饮食模式的有益或有害属性,以及旨在通过饮食改善健康的干预措施的成本效益。这篇综述描述了营养经济学的一些最新文献及其对世界各地粮食政策的影响。新的营养经济学得益于行为科学和社会科学的坚实基础,以自然科学和健康科学的证据为基础,解决人类福祉和可持续发展的基本问题。
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引用次数: 26
Retracted Journal Articles and New Research Opportunities to Change Eating Behavior 撤回的期刊文章和改变饮食行为的新研究机会
Pub Date : 2019-01-01 DOI: 10.2139/ssrn.3716474
B. Wansink
In 2017-19, about 18 of my research articles were retracted. These retractions offer some useful lessons to scholars, and they also offer some useful next steps to those who want to publish in the social sciences. Two of these steps include 1) Choose a publishable topic, and 2) have a rough mental roadmap of what the finished paper might look. That is, what’s the positioning, the study, and the possible contribution.

The topics I’ve described here offer one set of roadmaps that could be useful. First, they were of interest to journals in medicine, behavioral economics, marketing, nutrition, psychology, health, and consumer behavior. Second, they each show what a finished paper might look like. They show the positioning, relevant background research, methodological tips, and key implications.

I find all of these topics super interesting and of practical importance. This document provides a two-page template for each one that shows 1) An overview why it was done, 2) the abstract (or a summary if there was no abstract), 3) the reason it was retracted, 4) how it could be done differently, and 5) promising new research opportunities on the topic.

Table 1 and Appendix D lay out an estimate of how much effort it might take to do studies on these topics, and Appendix B lays out other issues related to how these specific papers were investigated. I’ve also estimated what I think the practical impact each research project might have. These are my own subjective estimates, but you might find them a useful starting point if you’re looking for a tie-breaker between two different topics.

I would strongly encourage anyone who’s interested in publishing in these areas to closely follow the principles of open science. You can start by preregistering hypotheses and planned analyses, and following the other steps along the road to publication. Making specific hypotheses and testing them followed by open science principles will be the best next way forward on these topics.

Academia can be a tremendously rewarding career both you and for the people who benefit from you research. Best wishes in moving topics like these forward, and best wishes on a great career.
在2017-19年,我大约有18篇研究论文被撤回。这些撤稿事件为学者们提供了一些有用的教训,也为那些想要在社会科学领域发表论文的人提供了一些有用的后续步骤。其中两个步骤包括:1)选择一个可发表的主题;2)在脑海中勾画出最终论文的大致蓝图。也就是说,定位,研究和可能的贡献是什么。我在这里描述的主题提供了一组可能有用的路线图。首先,他们对医学、行为经济学、市场营销、营养学、心理学、健康和消费者行为等期刊感兴趣。其次,他们每个人都展示了一篇完成的论文可能是什么样子。它们展示了定位、相关的背景研究、方法提示和关键含义。我发现所有这些话题都非常有趣,而且具有实际意义。这份文件为每一篇文章提供了一个两页的模板,其中显示了1)概述为什么要这样做,2)摘要(如果没有摘要,则是摘要),3)撤回的原因,4)如何以不同的方式完成,以及5)在该主题上有希望的新研究机会。表1和附录D列出了对这些主题进行研究可能需要多少努力的估计,附录B列出了与如何调查这些特定论文相关的其他问题。我还估计了我认为每个研究项目可能产生的实际影响。这些都是我自己的主观估计,但如果你正在寻找两个不同主题之间的平衡点,你可能会发现它们是一个有用的起点。我强烈鼓励任何对这些领域的出版感兴趣的人密切遵循开放科学的原则。您可以从预先注册假设和计划分析开始,并遵循发布之路的其他步骤。提出具体的假设,并遵循开放科学原则对其进行测试,将是解决这些问题的最佳途径。学术界对你和从你的研究中受益的人来说都是一个非常有益的职业。祝愿这些话题顺利进行,并祝你事业有成。
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引用次数: 0
Improving Estimation of Labor Market Disequilibrium Using Shortage Indicators, with an Application to the Market for Anesthesiologists 利用短缺指标改进劳动力市场非均衡估计,并在麻醉师市场中的应用
Pub Date : 2019-01-01 DOI: 10.2139/ssrn.3390116
M. Baird, Lindsay Daugherty, Krishna B. Kumar
While economic studies often assume that labor markets are in equilibrium, there may be specialized labor markets that are likely in disequilibrium. We develop a new methodology to improve the estimation of a reduced form disequilibrium model from the existing models by incorporating survey-based shortage indicators into the model and estimation. Our shortage-indicator informed disequilibrium model includes as a special case the foundational model of Maddala and Nelson (1974). We demonstrate the gains in information provided by our methodology. We show how the model can be implemented by applying it to the market for anesthesiologists, a profession susceptible to disequilibrium. In this application, we find that our new disequilibrium model informed by a shortage indicator fits the data better than the Maddala-Nelson model, and has better out-of-sample predictive power.
虽然经济研究通常假设劳动力市场处于均衡状态,但可能存在一些可能处于不均衡状态的专门劳动力市场。我们开发了一种新的方法,通过将基于调查的短缺指标纳入模型和估计,来改进现有模型的简化形式不平衡模型的估计。我们的短缺指标通知非均衡模型包括Maddala和Nelson(1974)的基础模型作为一个特例。我们展示了我们的方法所提供的信息的收益。我们通过将该模型应用于麻醉师这个易受不平衡影响的职业市场来展示如何实施该模型。在这个应用中,我们发现我们的新的由短缺指标通知的非均衡模型比Maddala-Nelson模型更适合数据,并且具有更好的样本外预测能力。
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引用次数: 3
SVAR Modeling of Inflation Response to Monetary Policy in Russia 俄罗斯通货膨胀对货币政策响应的SVAR模型
Pub Date : 2018-11-20 DOI: 10.2139/ssrn.3373944
S. Smirnov, Vladimir Tlostanov
The objective of this work was to assess the impact of the monetary policy of the central bank of the Russian Federation on the level of inflation using the structural autoregression model (SVAR). The results show significant inflation responses in the first months to different approximations of monetary policy. Thus, with an increase in the money supply (M2) by 1%, inflation in the first month increases by 0.23%, and with an increase in the interbank lending rate by the same amount, inflation increases by 0.125%. Inflation attenuation at the 90% level of significance occurs at 5 and 6 months, respectively. At the 95% level of significance, when the money supply changes, the inflation response dies out in the second month. When changing the interbank loan rate, the attenuation occurs in the fifth month.
这项工作的目的是利用结构自回归模型(SVAR)评估俄罗斯联邦中央银行货币政策对通货膨胀水平的影响。结果显示,在最初的几个月里,不同的近似货币政策对通货膨胀做出了显著的反应。因此,货币供应量(M2)每增加1%,第一个月的通货膨胀率就会上升0.23%,而银行间拆借利率每增加1%,通货膨胀率就会上升0.125%。通货膨胀衰减在90%显著水平分别发生在第5个月和第6个月。在95%显著性水平上,当货币供应量变化时,通货膨胀反应在第二个月消失。当改变银行间贷款利率时,衰减发生在第5个月。
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引用次数: 0
The Intended and Unintended Consequences of the Hospital Readmission Reduction Program 减少医院再入院计划的预期和非预期后果
Pub Date : 2018-09-01 DOI: 10.2139/ssrn.3350492
Engy Ziedan
The Hospital Readmission Reduction Program (HRRP) is a prominent Pay−for− Performance (P4P) program of the Centers for Medicare and Medicaid (CMS) intended to reduce hospital readmissions. In this article, I use a regression kink design to examine whether hospitals that were penalized under the HRRP changed the process of care for patients targeted and untrageted by the policy, as measured by the amount and composition of resource use (e.g. length of stay, and spending on radiology, pharmacy, and laboratory). Estimates indicate that hospitals penalized for excess heart attack (AMI) readmissions decreased AMI readmissions by 30% and increased spending on AMI patients by 20%. This additional care had no impact on mortality. Interestingly, I find that these hospitals also increased the quantity of care for patients with diagnoses not targeted by the HRRP. Hospitals penalized for excess readmissions for relatively more frequent conditions (pneumonia and heart failure) did not respond to the HRRP incentives. I show using a conceptual model of hospital behavior that as the number of patients in the targeted condition rises, the hospital’s marginal cost of reducing the penalty increases by relatively more than the marginal benefit. This intuitive result is novel and fundamental to the discussion on the relative incentive to reduce readmissions across medical diagnoses and how P4P programs can be optimized to reflect this differential cost.
医院再入院减少计划(HRRP)是医疗保险和医疗补助中心(CMS)的一个突出的绩效薪酬(P4P)计划,旨在减少医院再入院。在本文中,我使用回归结设计来检验在HRRP下受到惩罚的医院是否改变了对目标患者和未受该政策影响的患者的护理过程,这是通过资源使用的数量和组成来衡量的(例如住院时间,以及放射学、药房和实验室的支出)。估计表明,因心脏病发作(AMI)再入院而受到处罚的医院将AMI再入院率降低了30%,并将AMI患者的支出增加了20%。这种额外的护理对死亡率没有影响。有趣的是,我发现这些医院还增加了对那些诊断不属于HRRP目标的患者的护理数量。因相对较常见的疾病(肺炎和心力衰竭)而被处罚的医院对HRRP激励措施没有反应。我使用医院行为的概念模型表明,随着目标病情患者数量的增加,医院减少惩罚的边际成本相对大于边际效益的增加。这一直观的结果是新颖的,是讨论减少医疗诊断再入院的相对激励以及如何优化P4P计划以反映这种差异成本的基础。
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引用次数: 6
The Relationship Between Cigarettes and Electronic Cigarettes: Evidence From Household Panel Data 香烟与电子烟的关系:来自家庭面板数据的证据
Pub Date : 2018-07-30 DOI: 10.2139/ssrn.3222998
Chad Cotti, Erik T. Nesson, Nathan Tefft
We use the Nielsen Consumer Panel to investigate the impact of tobacco control policies on purchases of electronic cigarettes (e-cigarettes), cigarettes, and smoking cessation products. We measure product quantity, product type, nicotine content, and liquid volume of e-cigarettes, and product quantity and nicotine content of cigarettes. Higher cigarette excise taxes decrease both cigarette and e-cigarette purchases, suggesting that cigarettes and e-cigarettes are complements, and higher cigarette excise taxes reduce the aggregate amount of nicotine purchased from cigarettes and e-cigarettes. Cigarette smoke-free air laws decrease cigarette purchases, while e-cigarette smoke-free air laws do not affect cigarette or e-cigarette purchases.
我们使用尼尔森消费者小组来调查烟草控制政策对购买电子烟、香烟和戒烟产品的影响。我们测量了电子烟的产品数量、产品类型、尼古丁含量、液量,以及香烟的产品数量和尼古丁含量。更高的香烟消费税会减少香烟和电子烟的购买量,这表明香烟和电子烟是互补的,更高的香烟消费税会减少从香烟和电子烟中购买的尼古丁总量。无烟空气法减少了香烟的购买量,而电子烟无烟空气法不影响香烟或电子烟的购买量。
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引用次数: 32
Identifying and Computing the Exact Core-determining Class 识别和计算精确的核心确定类
Pub Date : 2018-04-02 DOI: 10.2139/ssrn.3154285
Ye Luo, Hai Wang
The indeterministic relations between unobservable events and observed outcomes in partially identified models can be characterized by a bipartite graph. Given a probability measure on observed outcomes, the set of feasible probability measures on unobservable events can be defined by a set of linear inequality constraints, according to Artstein's Theorem. This set of inequalities is called the “core-determining class”. However, the number of inequalities defined by Artstein's Theorem is exponentially increasing with the number of unobservable events, and many inequalities may in fact be redundant. In this paper, we show that the exact core-determining class, i.e., the smallest possible core-determining class, can be characterized by a set of combinatorial rules of the bipartite graph. We prove that if the bipartite graph and the measure on observed outcomes are non-degenerate, the exact core-determining class is unique and it only depends on the structure of the bipartite graph. We then propose an algorithm that explores the structure of the bipartite graph to construct the exact core-determining class. We design and implement the model and algorithm in a set of examples to show that our methodology could efficiently discard the redundant inequalities that are not useful to identify the parameter of interest. We also demonstrate that, by using the inequalities corresponding to the exact core-determining class to perform set inference, the power of test statistics against local alternatives can be improved.
在部分识别模型中,不可观测事件与观测结果之间的不确定性关系可以用二部图来表示。根据阿特斯坦定理,给定观测结果的概率测度,不可观测事件的可行概率测度集可以由一组线性不等式约束来定义。这组不等式被称为“核心决定类”。然而,由Artstein定理定义的不等式的数量随着不可观测事件的数量呈指数增长,许多不等式实际上可能是冗余的。本文证明了精确定核类,即最小可能的定核类,可以用二部图的一组组合规则来表示。我们证明了如果二部图和观测结果上的测度是非退化的,则精确定核类是唯一的,它只依赖于二部图的结构。然后,我们提出了一种算法来探索二部图的结构,以构造精确的核确定类。我们在一组示例中设计和实现了模型和算法,以表明我们的方法可以有效地丢弃对识别感兴趣参数无用的冗余不等式。我们还证明,通过使用与精确核决定类对应的不等式来执行集合推理,可以提高测试统计量对局部替代的能力。
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引用次数: 0
'Examining the Impact of Health Care Consolidation' Statement before the Committee on Energy and Commerce, Oversight and Investigations Subcommittee, U.S. House of Representatives 在美国众议院能源和商业委员会监督和调查小组委员会面前发表的“审查医疗保健合并的影响”声明
Pub Date : 2018-02-14 DOI: 10.2139/ssrn.3287848
M. Gaynor
• The U.S. health care system is based on markets. The system will work only as well as the markets that underpin it. • These markets do not function as well as they could, or should. Prices are high and rising, there are incomprehensible and egregious pricing practices, quality is sub-optimal, and the sector is sluggish and unresponsive, in contrast to the innovation and dynamism which characterize much of the rest of our economy. • Lack of competition has a lot to do with these problems. • There has been a great deal of consolidation in health care. There have been 1,519 hospital mergers in the past twenty years, with 680 since 2010. The result is that many local areas are now dominated by one large, powerful health system, e.g., Boston (Partners), Pittsburgh (UPMC), and San Francisco (Sutter). • Insurance markets are also highly consolidated. The two largest insurers have 70 percent of the market or more in one-half of all local insurance markets. • Physician services markets have also become increasingly more concentrated. Two-thirds of specialist physician markets are highly concentrated, and 29 percent for primary care physicians. There have been a very large number of acquisitions of physician practices by hospitals, so much so that 33 percent of all physicians, and 44 percent of primary physicians are now employed by hospitals. • Extensive research evidence shows that consolidation between close competitors leads to substantial price increases for hospitals, insurers, and physicians, without offsetting gains in improved quality or enhanced efficiency. Further, recent evidence shows that mergers between hospitals not in the same geographic area can also lead to increases in price. Just as seriously, if not more, evidence shows that patient quality of care suffers from lack of competition. • This is causing serious harm to patients and to the health care system as a whole. • Policies are needed to support and promote competition in health care markets. This includes policies to strengthen choice and competition, and ending distortions that unintentionally incentivize consolidation. • These include: – Focus and strengthen antitrust enforcement. – End policies that unintentionally incentivize consolidation. – End policies that hamper new competitors and impede competition. – Promote transparency, so employers, policymakers, and consumers have access to information about health care costs and quality.
•美国的医疗保健体系以市场为基础。这个体系只有在支撑它的市场中才能发挥作用。•这些市场没有发挥应有的作用。价格居高不下,而且还在上涨,定价做法令人难以理解,令人震惊,质量不够理想,与创新和活力形成鲜明对比的是,这个行业反应迟钝,反应迟钝,而创新和活力是我们经济其他领域的特征。缺乏竞争与这些问题有很大关系。•在卫生保健领域进行了大量整合。在过去的20年里,有1519家医院合并,自2010年以来有680家。其结果是,许多地方现在由一个强大的大型卫生系统主导,例如波士顿(Partners)、匹兹堡(UPMC)和旧金山(Sutter)。•保险市场也高度整合。这两家最大的保险公司在一半的本地保险市场中占有70%或更多的市场份额。•医生服务市场也变得越来越集中。三分之二的专科医生市场高度集中,29%的初级保健医生市场高度集中。医院收购了大量的医生,以至于33%的医生和44%的初级医生都受雇于医院。•广泛的研究证据表明,密切竞争对手之间的合并导致医院、保险公司和医生的价格大幅上涨,但不会抵消质量改善或效率提高带来的收益。此外,最近的证据表明,不在同一地理区域的医院之间的合并也可能导致价格上涨。同样严重(如果不是更严重的话)的是,证据表明,缺乏竞争影响了患者的护理质量。•这对患者和整个医疗保健系统造成了严重伤害。•需要制定政策来支持和促进保健市场的竞争。这包括加强选择和竞争的政策,以及结束无意中刺激整合的扭曲。•这些措施包括:-关注并加强反垄断执法。-终止无意中鼓励合并的政策。-终止阻碍新竞争者和阻碍竞争的政策。-提高透明度,使雇主、政策制定者和消费者能够获得有关医疗保健成本和质量的信息。
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引用次数: 35
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Demand & Supply in Health Economics eJournal
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