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Getting the Rich and Powerful to Give 让有钱有势的人给予
Pub Date : 2018-06-05 DOI: 10.2139/ssrn.2994367
Judd B. Kessler, Katherine L. Milkman, C. Y. Zhang
What motivates the rich and powerful to exhibit generosity? We explore this important question in a large field experiment. We solicit donations from 32,174 alumni of an Ivy League university, including thousands of rich and powerful alumni. Consistent with past psychology research, we find that the rich and powerful respond dramatically, and differently than others, to being given a sense of agency over the use of donated funds. Gifts from rich and powerful alumni increase by 100%–350% when they are given a sense of agency. This response arises primarily on the intensive margin with no effect on the likelihood of donating. Results suggest that motivating the rich and powerful to act may require tailored interventions. This paper was accepted by Uri Gneezy, behavioral economics.
是什么促使有钱有势的人表现出慷慨?我们在一个大型的野外实验中探讨了这个重要的问题。我们向一所常春藤盟校的32,174名校友募捐,其中包括数千名有钱有势的校友。与过去的心理学研究一致,我们发现有钱有势的人对捐赠资金的使用有一种代理感的反应非常强烈,而且与其他人不同。当有钱有势的校友被赋予代理意识时,他们的礼物会增加100%-350%。这种反应主要发生在密集的边缘,对捐赠的可能性没有影响。结果表明,激励有钱有势的人采取行动可能需要量身定制的干预措施。这篇论文被行为经济学的Uri Gneezy接受。
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引用次数: 28
Police and Crime: Further Evidence from a Quasi-Natural Experiment 警察与犯罪:来自准自然实验的进一步证据
Pub Date : 2018-06-01 DOI: 10.2139/ssrn.3211154
V. Cardoso, Marcelo Resende
The paper investigates the effect of police presence on homicides at the municipality level in Brazil during the January 2010 to December 2014 period. For this purpose, occasional and illegal police strikes are considered as relevant shocks in a quasi-natural experiment. After controlling for different variables that explain heterogeneity across municipalities, it is possible to identify a sizeable effect accruing from police strikes on the occurrence of homicides. Despite a conservative analysis that involves temporal and spatial aggregation of variables, the evidence indicates that police strikes lead, on average, to a 16% increase in the homicide rate if one considers a broader sample of 3597 municipalities. The focus of the analysis for a large and heterogeneous country also partially may mitigate concerns for external validity that had been raised in the context of previous studies in the related literature.
本文调查了2010年1月至2014年12月期间巴西市政一级警察存在对凶杀案的影响。为此,在准自然实验中,偶尔和非法的警察罢工被视为相关冲击。在控制了解释不同城市之间异质性的不同变量之后,有可能确定警察罢工对杀人事件的发生产生了相当大的影响。尽管保守的分析涉及变量的时空聚合,但证据表明,如果考虑到3597个城市的更广泛样本,警察罢工导致凶杀率平均上升16%。分析的重点是一个庞大而异质性的国家,这也部分地减轻了在相关文献的先前研究背景下对外部有效性的担忧。
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引用次数: 0
Risky Choices and Solidarity: Why Experimental Design Matters 冒险选择和团结:为什么实验设计很重要
Pub Date : 2018-06-01 DOI: 10.2139/ssrn.3235229
Conny Wunsch, R. Strobl
Negative income shocks can either be the consequence of risky choices or random events. A growing literature analyzes the role of responsibility for neediness for informal financial support of individuals facing negative income shocks based on randomized experiments. In this paper, we show that studying this question involves a number of challenges that existing studies either have not been aware of, or have been unable to address satisfactorily. We show that the average effect of free choice of risk on sharing, i.e. the comparison of mean sharing across randomized treatments, is not informative about the behavioural effects and that it is not possible to ensure by the experimental design that the average treatment effect equals the behavioural effect. Instead, isolating the behavioural effect requires conditioning on risk exposure. We show that a design that measures subjects preferred level of risk in all treatments allows isolating this effect without additional assumptions. Another advantage of our design is that it allows disentangling changes in giving behaviour due to attributions of responsibility for neediness from other explanations. We implement our design in a lab experiment we conducted with slum dwellers in Nairobi that measures subjects’ transfers to a worse-off partner both in a setting where participants could either deliberately choose or were randomly assigned to a safe or a risky project. We find that free choice matters for giving and that the effects depend on donors’ risk preferences but that attributions of responsibility play a negligible role in this context.
负收入冲击既可能是风险选择的结果,也可能是随机事件的结果。越来越多的文献基于随机实验分析了面临负收入冲击的个人的非正式财务支持需求的责任作用。在本文中,我们表明,研究这个问题涉及到许多挑战,现有的研究要么没有意识到,要么无法令人满意地解决。我们表明,风险自由选择对分担的平均影响,即随机治疗中平均分担的比较,不能提供关于行为效应的信息,并且不可能通过实验设计确保平均治疗效应等于行为效应。相反,孤立行为效应需要对风险暴露进行调节。我们表明,测量受试者在所有治疗中的首选风险水平的设计可以在没有额外假设的情况下隔离这种影响。我们设计的另一个优点是,它允许从其他解释中分离出由于需要责任的归因而导致的给予行为的变化。我们在一个实验室实验中实施了我们的设计,我们对内罗毕的贫民窟居民进行了实验,测量了受试者向境况较差的伴侣的转移,在这个实验中,参与者可以故意选择,也可以随机分配到一个安全或有风险的项目。我们发现自由选择对捐赠很重要,其影响取决于捐赠者的风险偏好,但在这种情况下,责任归因的作用可以忽略不计。
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引用次数: 3
Identification of Causal Mechanisms Based on Between-Subject Double Randomization Designs 基于受试者间双随机化设计的因果机制识别
Pub Date : 2018-06-01 DOI: 10.2139/ssrn.3237318
Conny Wunsch, R. Strobl
Understanding the mechanisms through which treatment effects come about is crucial for designing effective interventions. The identification of such causal mechanisms is challenging and typically requires strong assumptions. This paper discusses identification and estimation of natural direct and indirect effects in so-called double randomization designs that combine two experiments. The first and main experiment randomizes the treatment and measures its effect on the mediator and the outcome of interest. A second auxiliary experiment randomizes the mediator of interest and measures its effect on the outcome. We show that such designs allow for identification based on an assumption that is weaker than the assumption of sequential ignorability that is typically made in the literature. It allows for unobserved confounders that do not cause heterogeneous mediator effects. We demonstrate estimation of direct and indirect effects based on different identification strategies that we compare to our approach using data from a laboratory experiment we conducted in Kenya.
了解治疗效果产生的机制对于设计有效的干预措施至关重要。确定这种因果机制具有挑战性,通常需要强有力的假设。本文讨论了在结合两个实验的所谓双随机化设计中自然直接和间接效应的识别和估计。第一个主要实验随机化治疗并测量其对中介和感兴趣的结果的影响。第二个辅助实验随机化感兴趣的中介并测量其对结果的影响。我们表明,这样的设计允许识别基于一个假设,弱于顺序可忽略性的假设,通常是在文献中作出的。它允许不引起异质性中介效应的未观察到的混杂因素。我们展示了基于不同识别策略的直接和间接影响的估计,我们使用我们在肯尼亚进行的实验室实验的数据将这些策略与我们的方法进行比较。
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引用次数: 4
Cooperation Creates Special Moral Obligations 合作产生特殊的道德义务
Pub Date : 2018-05-18 DOI: 10.1596/1813-9450-8531
A. Cappelen, V. Gauri, Bertil Tungodden
A large-scale economic experiment, conducted on a representative sample of the US population, shows that cooperation creates special moral obligations. Participants in the experiment, acting as impartial spectators, transferred significantly more money to an unlucky worker when two individuals had cooperated than when they had worked independently. The authors further show that the effect of cooperation is strongly associated with political affiliation, with Democrats attaching significantly more importance to cooperation as a source of moral obligation than Republicans. The findings shed light on the foundations of redistributive preferences and may contribute to explain the often observed asymmetry in moral concern for different groups of individuals, both nationally and internationally.
一项针对美国人口代表性样本进行的大规模经济实验表明,合作产生了特殊的道德义务。实验参与者作为中立的旁观者,当两个人合作时,他们给不幸的工人的钱明显多于他们独立工作时。作者进一步表明,合作的效果与政治立场密切相关,民主党人比共和党人更重视合作作为道德义务的来源。这些发现揭示了再分配偏好的基础,并可能有助于解释经常观察到的不同群体在道德关注方面的不对称性,无论是在国内还是在国际上。
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引用次数: 0
Capstone Project Based Experiential Learning – Case of Institute of Business Management (IoBM) 顶点项目式体验式学习——以美国工商管理学院为例
Pub Date : 2018-02-27 DOI: 10.5171/2018.412705
Marium Mateen Khan, Ekhlaque Ahmed
The case study aims to highlight the importance, process and framework of the Capstone Project Course (Experiential Learning) that has been initiated by Institute of Business Management (IoBM). The case provides detailed analysis of how the Project is executed by the students under the guidance of the Faculty and industry supervisors assigned to each group of students. The project entails various methods to monitor the performance of the task at hand and the students input and efforts in the duration of both Capstone 1 and Capstone 2 Projects (3 credit hours each). This initiative taken by the university highlights the different aspects of experiential learning processes and how they benefit the academia as well as the company in the industry. It is a cost free project carried out by students to enhance their learning and exposure into the corporate sector first hand. This kind of projects from multiple disciplinarians has proven to be a milestone for the students and the University in learning with concrete outcomes for the industry as a whole.
本案例研究旨在强调由商业管理学院(IoBM)发起的顶点项目课程(体验式学习)的重要性、过程和框架。本案例详细分析了学生如何在分配给每组学生的学院和行业主管的指导下执行该项目。该项目需要各种方法来监控手头任务的表现,以及学生在顶点1和顶点2项目期间的投入和努力(每个项目3学时)。该大学采取的这一举措突出了体验式学习过程的不同方面,以及它们如何使学术界和行业内的公司受益。这是一个免费的项目,由学生进行,以提高他们的学习和接触到企业部门的第一手资料。这种来自多个学科的项目已经被证明是学生和大学在学习方面的一个里程碑,并为整个行业带来了具体的成果。
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引用次数: 0
Frustration-Based Promotions: Field Experiments in Ride-Sharing 基于挫折的促销:拼车的实地实验
Pub Date : 2018-02-25 DOI: 10.2139/ssrn.3129717
Maxime C. Cohen, Michael-David Fiszer, B. Kim
The service industry has become increasingly competitive. One of the main drivers for increasing profits and market share is service quality. When consumers encounter a bad experience, or a frustration, they may be tempted to stop using the service. In collaboration with the ride-sharing platform Via, our goal is to understand the benefits of proactively compensating customers who have experienced a frustration. Motivated by historical data, we consider two types of frustrations: long waiting times and long travel times. We design and run three field experiments to investigate how different types of compensation affect the engagement of riders who experienced a frustration. We find that sending proactive compensation to frustrated riders (i) is profitable and boosts their engagement behavior, (ii) works well for long waiting times but not for long travel times, (iii) seems more effective than sending the same offer to nonfrustrated riders, and (iv) has an impact moderated by past usage frequency. We also observe that the best strategy is to send credit for future usage (as opposed to waiving the charge or sending an apologetic message). This paper was accepted by Vishal Gaur, operations management.
服务业竞争日趋激烈。提高利润和市场份额的主要驱动力之一是服务质量。当消费者遇到糟糕的体验或挫折时,他们可能会试图停止使用该服务。通过与乘车共享平台Via的合作,我们的目标是了解主动补偿遭遇挫折的客户的好处。受历史数据的启发,我们考虑了两种类型的挫折:漫长的等待时间和漫长的旅行时间。我们设计并运行了三个实地实验,以调查不同类型的补偿如何影响经历挫折的骑手的参与。我们发现,向沮丧的乘客发送主动补偿(i)是有利可图的,并提高了他们的参与行为,(ii)对长时间的等待有效,但对长时间的旅行无效,(iii)似乎比向没有沮丧的乘客发送相同的优惠更有效,(iv)影响被过去的使用频率所缓和。我们还观察到,最好的策略是发送信用以备将来使用(而不是免除费用或发送道歉信息)。本文被运营管理专业的Vishal Gaur接受。
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引用次数: 26
The Formation and Malleability of Dietary Habits: A Field Experiment with Low Income Families 饮食习惯的形成与可延展性:低收入家庭的田间试验
Pub Date : 2018-02-14 DOI: 10.1257/rct.3281-1.0
M. Belot, Noémi Berlin, Jonathan James, Valeria Skafida
We conduct a field experiment to evaluate the extent to which dietary habits are malleable early on in childhood and later in life. We implement two treatments one that targets what people eat, the other that targets the timing and frequency of food intake. 285 low income families with young children were recruited and assigned either to a control group or one of the two treatments, each of them lasting for 12 consecutive weeks. In one treatment, families received food groceries at home for free for 12 weeks and were asked to prepare five specific healthy meals per week. In the other treatment, families were simply asked to reduce snacking and eat at regular times. We collected a range of measures of food preferences, dietary intake, as well as BMI and biomarkers based on blood samples. We find evidence that children's BMI distribution shifted significantly relative to the control group, i.e. they became relatively "thinner". We also find some evidence that their preferences have been affected by both treatments. On the other hand, we find little evidence of effects on parents. We conclude that exposure to a healthy diet and regularity of food intake possibly play a role in shaping dietary habits, but influencing dietary choices later on in life remains a major challenge.
我们进行了一项实地实验,以评估饮食习惯在儿童早期和以后生活中的可塑性程度。我们实施了两种治疗方法,一种针对人们吃什么,另一种针对食物摄入的时间和频率。研究人员招募了285个有幼儿的低收入家庭,将他们分为对照组和两组,每组持续12周。在一项治疗中,家庭在12周内免费获得食品杂货,并被要求每周准备五顿特定的健康餐。在另一种治疗中,只要求家庭少吃零食,定时吃饭。我们收集了一系列食物偏好、饮食摄入量、身体质量指数和基于血液样本的生物标志物。我们发现有证据表明,儿童的BMI分布相对于对照组发生了显著变化,即他们变得相对“更瘦”。我们还发现一些证据表明,他们的偏好受到两种治疗的影响。另一方面,我们几乎没有发现对父母有影响的证据。我们的结论是,健康的饮食和规律的食物摄入可能在形成饮食习惯方面发挥作用,但在以后的生活中影响饮食选择仍然是一个主要的挑战。
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引用次数: 9
Evaluating Intergenerational Persistence of Economic Preferences: A Large Scale Experiment with Families in Bangladesh 评估经济偏好的代际持续性:孟加拉国家庭的大规模实验
Pub Date : 2018-02-01 DOI: 10.2139/ssrn.3126092
S. Chowdhury, Matthias Sutter, K. Zimmermann
Economic preferences – like time, risk and social preferences – have been shown to be very influential for real-life outcomes, such as educational achievements, labor market outcomes, or health status. We contribute to the recent literature that has examined how and when economic preferences are formed, putting particular emphasis on the role of intergenerational transmission of economic preferences within families. Our paper is the first to run incentivized experiments with fathers and mothers and their children by drawing on a unique dataset of 1,999 members of Bangladeshi families, including 911 children, aged 6-17 years, and 544 pairs of mothers and fathers. We find a large degree of intergenerational persistence as the economic preferences of mothers and fathers are significantly positively related to their children’s economic preferences. Importantly, we find that socio-economic status of a family has no explanatory power as soon as we control for parents’ economic preferences. A series of robustness checks deals with the role of older siblings, the similarity of parental preferences, and the average preferences within a child’s village.
经济偏好——如时间、风险和社会偏好——已被证明对现实生活结果有很大影响,如教育成就、劳动力市场结果或健康状况。我们为最近的文献做出了贡献,这些文献研究了经济偏好是如何以及何时形成的,特别强调了家庭中经济偏好的代际传递的作用。我们的论文是第一个对父母及其子女进行激励实验的论文,它利用了一个独特的数据集,该数据集包括1999个孟加拉国家庭成员,其中包括911名6-17岁的儿童,以及544对父母。我们发现了很大程度的代际持久性,因为母亲和父亲的经济偏好与其子女的经济偏好显着正相关。重要的是,我们发现,一旦我们控制了父母的经济偏好,家庭的社会经济地位就没有解释力。一系列的鲁棒性检查处理哥哥姐姐的角色,父母偏好的相似性,以及孩子所在村庄的平均偏好。
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引用次数: 20
Do the Right Thing: Experimental Evidence that Preferences for Moral Behavior, Rather Than Equity or Efficiency per se, Drive Human Prosociality 做正确的事:对道德行为的偏好,而不是公平或效率本身,驱动人类亲社会的实验证据
Pub Date : 2018-01-01 DOI: 10.2139/ssrn.2965067
V. Capraro, David G. Rand
Decades of experimental research show that some people forgo personal gains to benefit others in unilateral anonymous interactions. To explain these results, behavioral economists typically assume that people have social preferences for minimizing inequality and/or maximizing efficiency (social welfare). Here we present data that cannot be explained by these standard social preference models. We use a “Trade-Off Game” (TOG), where players unilaterally choose between an equitable option and an efficient option. We show that simply changing the labelling of the options to describe the equitable versus efficient option as morally right completely reverses the correlation between behavior in the TOG and play in a separate Dictator Game (DG) or Prisoner’s Dilemma (PD): people who take the action framed as moral in the TOG, be it equitable or efficient, are much more prosocial in the DG and PD. Rather than preferences for equity and/or efficiency per se, our results suggest that prosociality in games such as the DG and PD are driven by a generalized morality preference that motivates people to do what they think is morally right.
几十年的实验研究表明,一些人在单方面的匿名互动中放弃个人利益以造福他人。为了解释这些结果,行为经济学家通常假设人们有最小化不平等和/或最大化效率(社会福利)的社会偏好。在这里,我们提出的数据不能解释这些标准的社会偏好模型。我们使用“权衡游戏”(TOG),即玩家单方面在公平选项和有效选项之间做出选择。我们表明,简单地改变选项的标签,将公平和有效的选项描述为道德正确的选项,完全逆转了TOG中的行为与单独的独裁者游戏(DG)或囚徒困境(PD)中的行为之间的相关性:在TOG中采取道德行为的人,无论是公平还是有效,在DG和PD中都更加亲社会。我们的研究结果表明,《DG》和《PD》等游戏中的亲社会行为并非出于对公平和/或效率本身的偏好,而是受到一种普遍的道德偏好的驱动,这种偏好促使人们去做他们认为在道德上正确的事情。
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引用次数: 117
期刊
Political Methods: Experiments & Experimental Design eJournal
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