Papers - All

Avner Ben-Ner, John A List, Louis Putterman, Anya Samek

Cited by*: 0 Downloads*: 43

An active area of research within the social sciences concerns the underlying motivation for sharing scarce resources and engaging in other pro-social actions. We develop a theoretical framework that sheds light on the developmental origins of social preferences by providing mechanisms through which parents transmit preferences for generosity to their children. Then, we conduct a field experiment with nearly 150 3-5 year old children and their parents, measuring (1) whether child and parent generosity is correlated, (2) whether children are influenced by their parents when making sharing decisions and (3) whether parents model generosity to children. We observe no correlation of independently measured parent and child sharing decisions at this young age. Yet, we find that apart from those choosing an equal allocation of resources between themselves and another child, children adjust their behaviors to narrow the gap with their parent's or other adult's choice. We find that fathers, and parents of initially generous children, increase their sharing when informed that their child will be shown their choice.

Julian Conrads, Tommaso Reggiani, Rainer M Rilke

Cited by*: 0 Downloads*: 51

Ambiguity about the chances of winning represents a key aspect in lotteries. By means of a controlled field experiment, we exogenously vary the degree of ambiguity about the winning chances of lotteries organized to incentivize the contribution for a public good. In one treatment, people have been simply informed about the maximum number of potential participants (i.e. the number of lottery tickets released). In a second treatment, this information has been omitted as in all traditional lotteries. Our general finding shows that simply reducing the degree of ambiguity of the lottery leads to a sizable and significant increase (67%) in the participation rate. This result is robust to alternative prize configurations.

Amanda Chuan, Anya Samek

Cited by*: 0 Downloads*: 4

We conducted a field experiment with a charitable group to investigate whether giving the donor an option to write a personal message to the recipient influences giving behavior. Over 1,500 households were approached in a door-to-door campaign and randomized to either a control or a treatment in which donors could include a card for the recipient. We predict that treatment should increase contributions through making the gift more meaningful, but may also decrease contribution rate by increasing the social or other cost of donating. We find evidence in favor of the cost effect, and no evidence of increased giving.

Anya Samek

Cited by*: 0 Downloads*: 54

The gender difference in competitiveness has been cited as an important factor driving the gender gap in labor market outcomes. Using a natural field experiment with 35,000 university students, I explore the impact of compensation scheme on willingness to apply for a job. I find that competitive compensation schemes disproportionately deter women from applying, which cannot be explained by differences in risk preferences alone. I also vary whether the job is introduced as helping a non-profit, which increases application rates, suggesting a role for social preferences in application decisions. Finally, I observe a correlation between competitiveness preferences and career choice.

John A List, Anya Samek, Terri Zhu

Cited by*: 0 Downloads*: 67

We use a field experiment to investigate the effect of incentives on food purchase decisions at a grocery store. We recruit over 200 participants and track their purchases for a period of 6 months, permitting us a glimpse of more than 3,500 individual shopping trips. We randomize participants to one of several treatments, in which we incentivize fresh fruit and vegetable purchases, provide tips for fruit and vegetable preparation, or both. We report several key insights. First, our informational content treatment has little effect. Second, we find an important price effect: modest pecuniary incentives more than double the proportion of dollars spent on produce in the grocery store. Third, we find an interesting pattern of consumption after the experiment ends: even when incentives are removed, the treatment group has higher fruit and vegetable purchases compared to the control group. These long-term results are in stark contrast to either a standard price model or a behavioral model of 'crowd out.' Rather, our results are consonant with a habit formation model. This opens up the distinct possibility that short term incentives can be used as a key instrument to combat obesity.

Jie Bai

Cited by*: 0 Downloads*: 157

There is often a lack of reliable high quality provision in many markets in developing countries. I designed an experiment to understand this phenomenon in a setting that features typical market conditions in a developing country: the retail watermelon market in a major Chinese city. I begin by demonstrating empirically that there is substantial asymmetric information between sellers and buyers on sweetness, the key indicator of quality for watermelons, yet sellers do not sort and price watermelons by quality. I then randomly introduce one of two branding technologies into 40 out of 60 markets-one sticker label that is widely used and often counterfeited and one novel laser-cut label. I track sellers' quality, pricing and sales over an entire season and collect household panel purchasing data to examine the demand side's response. I find that laser branding induced sellers to provide higher quality and led to higher sales profits, establishing that reputational incentives are present and can be made to pay. However, after the intervention was withdrawn, all markets reverted back to baseline. To rationalize the experimental findings, I build an empirical model of consumer learning and seller reputation. The structural estimates suggest that consumers are hesitant to upgrade their perception about quality under the existing branding technology, which makes reputation building a low return investment. While the new technology enhances consumer learning, the resulting increase in profits is not sufficient to cover the fixed cost of the technology for small individual sellers. Counterfactual analysis shows that information frictions and fragmented markets lead to significant under-provision of quality. Third-party interventions that subsidize initial reputation building for sellers could improve welfare.

John A List

Cited by*: 0 Downloads*: 3

Given the importance of job placement for Ph.D.s, it is surprising that economists have not closely examined the factors that affect procuring job interviews for new Ph.D. economists.' In this study, I investigated those factors using a data set gathered at the 1997 American Economic Association (AEA) meetings in New Orleans. My purpose was to increase the information available to Ph.D. candidates who wish to maximize their postgraduation job prospects. In addition, this study may guide undergraduates and master's candidates who seek to pursue a Ph.D. in economics. The results of the findings, however, could benefit more than job seekers-they may provide academic departments and private industry with a comparative baseline for making decisions to interview job candidates. The job market for new Ph.D.s consists of two submarkets-academic and businesshndustry. The following are questions regarding job seekers in both submarkets. (1) Do employers in academia seek the same attributes as businesshndustry? (2) Is there discrimination in the interview decision? (3) Is an MBA important in the Ph.D. market? (4) How many more interviews are secured by candidates with a finished dissertation? (5) How important are teaching and research credentials? (6) Are graduates from top-ranked programs given special consideration in the job market? (7) Do personal letters of recommendation or calls from professors make a difference in the interview decision? (8) How influential are recommendation letters from prestigious economists? (9) What is the marginal effect of submitting another application? A simple theoretic construct provides a basis for understanding the two-step job-search process carried out by new Ph.D. economists.* In the first step, the job seeker decides whether to enter one or both submarkets and determines the optimal number of applications to submit. The second step reflects the actual decision process regarding acceptance or rejection of a job offer. Because a natural prerequisite to securing a job is an initial interview, my main focus in this study was to discover the optimal job search strategies for new Ph.D. economists by determining applicant characteristics that are conducive to obtaining interviews.

Sujoy Chakravarty, Carine Sebi, E Somanathan, Emmanuel Theophilus

Cited by*: 0 Downloads*: 7

The public goods problem (Hardin, 1968) either viewed as a problem of extraction or that of contribution has had a long history in the Social Sciences.Our experimental design uses a standard Voluntary Contributions Mechanism (VCM) game with a moderately large group of ten and face-to-face communication. The subjects, who are villagers in the Gori-Ganga Basin of the Central Himalayas, are not re-matched every period.Our results are somewhat different from laboratory experiments using a similar design such as Isaac and Walker (1988a, 1988b). A noteworthy general observation is that even with a relatively low Marginal Per Capita Return (MPCR = 0.2) and a large group we find a steady contribution rate around 55 percent, which diminishes slightly at the end of the session to around 45 percent. We also delve into the demographic characteristics of our subject pool and find that individual contribution to the common pool is determined by gender, age, caste, literacy and history of cooperation in the experiment. However, face-to-face communication is not seen to increase average individual contribution to the common pool.

Dean S Karlan, John A List

Cited by*: 0 Downloads*: 29

We conducted two matching grant experiments with an international development charity. The primary experiment finds that a matching grant from the Bill and Melinda Gates Foundation raises more funds than a matching grant from an anonymous donor. The effect persists, and is strongest for donors who previously gave to other poverty-oriented charities. Combining these insights with survey results, we conclude that our matching gift primarily works through a quality signal mechanism. Overall, the results help to clarify why people give to charity, what models help to describe those motivations, and how practitioners can leverage economics to increase their fundraising potential.

Tova Levin, Steven D Levitt, John A List

Cited by*: 0 Downloads*: 37

The wealthiest 10% of donors now give 90% of charitable dollars in the U.S., but little is known about what motivates them. This study uses a natural field experiment, tracking over five thousand high capacity donors, to lend preliminary insights into the world of high capacity givers. On some dimensions, high capacity donors mirror modal donors: there is persistence in giving patterns, signals of program quality influence giving, and the price of giving is not unduly important. Unlike typical small donors, the givers in our data respond only on the intensive margin, and often with a longer time lag. Our study highlights the value to practitioners of partnering with academics, as our intervention has generated $30 million in incremental donations to the University.

Richard Damania, Per Fredriksson , John A List

Cited by*: 0 Downloads*: 5

This study uses a three-stage common agency model to explore the linkages between trade policy, corruption and environmental policy in an imperfect market setting. We show that the effect of trade liberalization on the stringency of environmental policy depends critically on the level of corruption-in relatively corrupt countries, trade openness leads to more stringent environmental policy. In such countries, this interaction, therefore, lends trade liberalization a type of "multiplier effect," raising both economic growth and environmental policy stringency.

John A List, Warren McHone

Cited by*: 0 Downloads*: 9

In this article, we use annual (1980-90) county-level manufacturing plant location data for New York State to examine the effects of the 1977 Clean Air Act Amendments on the location decisions of new pollution-intensive manufacturing plants in the "neo-regulatory" (1980-84) and "mature-regulatory" (1985-90) phases of the Act's implementation. Our results suggest that the temporal effects of regulation vary. Whereas the location decisions of pollution intensive manufacturing firms were unaffected by the Act's regulatory restrictions in the "neo-regulatory" period, the restrictions appear to have had a significant negative impact on the location decisions of these types of firms in the Act's "mature-regulatory" phase. The diversion of new pollution intensive plants to counties with less stringent environmental regulations suggests that current US environmental regulations may be leading to a "browning process" whereby counties historically free of pollution become havens for polluters.

Jana Gallus

Cited by*: 0 Downloads*: 28

This natural field experiment tests the effects of purely symbolic awards on volunteer retention in a public goods context. The experiment is conducted at Wikipedia, which faces declining editor retention rates, particularly among newcomers. Randomization assures that award receipt is orthogonal to previous performance. The analysis reveals that awards have a sizeable effect on newcomer retention, which persists over the four quarters following the initial intervention. This is noteworthy for indicating that awards for volunteers can be effective even if they have no impact on the volunteers' future career opportunities. The awards are purely symbolic, and the status increment they produce is limited to the recipients' pseudonymous online identities in a community they have just recently joined. The results can be explained by enhanced self-identification with the community, but they are also in line with recent findings on the role of status and reputation, recognition, and evaluation potential in online communities.

Eliana Carranza, Robyn Meeks

Cited by*: 0 Downloads*: 57

Overloaded electrical systems are a major source of unreliable power (outages) in developing countries. Using a randomized saturation design, we estimate the impact of energy efficient lightbulbs on household electricity consumption and local electricity reliability. Receiving compact fluorescent lightbulbs (CFLs) significantly reduced household electricity consumption. Estimates not controlling for spillovers in take-up underestimate the impacts of the CFLs, as control households near the treated are likely to take-up CFLs themselves. Greater saturation of CFLs within a transformer leads to aggregate reliability impacts of two fewer days per month without electricity due to unplanned outages relative to pure controls. Increased electricity reliability permits households to consume more electricity services, suggesting that CFL treatment results in technological externalities. The spillovers in take-up and technological externalities that we document may provide an additional explanation for the gap between empirical and engineering estimates of the impacts of energy efficient technologies.

Elizabeth Lyons

Cited by*: 0 Downloads*: 42

Remote and short-term work arrangements are increasingly common despite the limited incentives they provide for acquiring firm-specific knowledge. This paper examines the importance and cost-effectiveness of firm-specific training for remote contract workers using evidence from a field experiment conducted in an East African insurance firm that offers two-month employment contracts for its salespeople. Findings show that firm-specific training significantly increases firm revenue, but that this effect is concentrated among higher ability workers. Training has no impact on worker retention, and offering workers financial or competitive input-based incentives has no impact on these findings, or on observed worker investment in firm-specific training. These results demonstrate that high ability temporary workers may be willing to invest in firm-specific human capital without additional incentives, and that firm performance is significantly improved as a result. Implications for temporary work contracts are discussed.

Gad Allon, Jan A. Van Mieghem, Dennis J. Zhang

Cited by*: 0 Downloads*: 71

This paper studies how service providers can design social interaction among participants and quantify the causal impact of that interaction on service quality. We focus on education and analyze whether encouraging social interaction among students improves learning outcomes in Massive Open Online Courses (MOOCs), which are a new service delivery channel with universal access at reduced, if not zero, cost. We analyze three randomized experiments in a MOOC with more than 30; 317 students from 183 countries. Two experiments study large-group interaction by encouraging a random subset of students to visit the course discussion board. The majority of students treated in these experiments had higher social engagement, higher quiz completion rates, and higher course grades. Using these treatments as instrumental variables, we estimate that one additional board visit causally increases the probability that a student finishes the quiz in the subsequent week by up to 4:3%. The third experiment studies small-group interaction by encouraging a random subset of students to conduct one-on-one synchronous discussions. Students who followed through and actually conducted pairwise discussions increased their quiz completion rates and quiz scores by 10% in the subsequent week. Combining results from these three experiments, we provide recommendations for designing social interaction mechanisms to improve service quality.

Laura Gee, Michael Schreck

Cited by*: 0 Downloads*: 11

Charitable giving has been about 2% of US GDP since the turn of the century. A popular fundraising tool is donation matching where every dollar is matched by a third party. But field experiments find that matching does not always increase donations. This may occur because individuals believe that peer donors will exhaust the matching funds. We develop a theory of how beliefs about peers' donations affect one's own likelihood of donation. We test our theory using novel "threshold match" treatments in field and laboratory experiments. These treatments form small groups and offer a flat matching bonus if a threshold number of donations is received. One "threshold match" treatment more than doubles the donation rate in the field relative to no match. To better understand the mechanism behind this huge increase, we use a lab study to replicate the field results and further show that beliefs about peers' donations matter. Our theoretical, lab, and field results combined suggest people are more likely to donate when they believe they are more pivotal to securing matching money. Beliefs about others matter, and they should be taken into account when trying to increase donations.

David Court, Benjamin Gillen, Jordi McKenzie, Charles R Plott

Cited by*: 0 Downloads*: 21

Successful field tests were conducted on two new Information Aggregation Mechanisms (IAMs). The mechanisms collected information held as intuitions about opening weekend box office revenues for movies in Australia. Participants were film school students. One mechanism is similar to parimutuel betting that produces a probability distribution over box office amounts. Except for "art house films", the predicted distribution is indistinguishable from the actual revenues. The second mechanism is based on guesses of the guesses of others and applied when incentives for accuracy could not be used. It tested well against data and contains information not encompassed by the first mechanism.

Guodong Gao, Tianshu Sun, Ginger Zhe Jin

Cited by*: 0 Downloads*: 64

While much research has examined the role of technology in moderating online user connections, how IT motivates offline interactions among users is much less understood. Using a randomized field experiment involving 80,000 participants, we study how mobile messaging can leverage recipients' social ties to encourage blood donation. There are three main findings: first, both behavior intervention (in the form of reminder message) and economic reward (in the form of individual or group reward) increase donations, but only the messages with group reward are effective in motivating more donors to donate with their friend(s); second, group reward tends to attract different types of donors, especially those who are traditionally less active in online social setting; and third, across all treatments, message recipients donate a greater amount of blood if their friends are present. Structural estimation further suggests that rewarding group donors is four times more cost-effective than rewarding individual donors. Based on the structural estimates, we perform policy simulations on the optimal design of mobile messaging. The method of combining structural model and randomized field experiment opens new frontiers for research on leveraging IT to mobilize a user's social network for social good.

Julian Conrads, Bernd Irlenbusch, Tommaso Reggiani, Rainer M Rilke, Dirk Sliwka

Cited by*: 0 Downloads*: 38

How to hire voluntary helpers? We shed new light on this question by reporting a field experiment in which we invited 2859 students to help at the 'ESA Europe 2012' conference. Invitation emails varied non-monetary and monetary incentives to convince subjects to offer help. Students could apply to help at the conference and, if so, also specify the working time they wanted to provide. Just asking subjects to volunteer or offering them a certificate turned out to be significantly more motivating than mentioning that the regular conference fee would be waived for helpers. By means of an online-survey experiment, we find that intrinsic motivation to help is likely to have been crowded out by mentioning the waived fee. Increasing monetary incentives by varying hourly wages of 1, 5, and 10 Euros shows positive effects on the number of applications and on the working time offered. However, when comparing these results with treatments without any monetary compensation, the number of applications could not be increased by offering money and may even be reduced.