Papers - John A List

John A List, Jeffrey A Livingston, Susanne Neckermann

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In the face of worryingly low performance on standardized test, offering students financial incentives linked to academic performance has been proposed as a potentially cost-effective way to support improvement. However, a large literature across disciplines finds that extrinsic incentives, once removed, may crowd out intrinsic motivation on subsequent, similar tasks. We conduct a field experiment where students, parents, and tutors are offered incentives designed to encourage student preparation for a high-stakes state test. The incentives reward performance on a separate low-stakes assessment designed to measure the same skills as the high-stakes test. Performance on the high-stakes test, however, is not incentivized. We find substantial treatment effects on the incented tests but no effect on the non-incented test; if anything, the incentives result in worse performance on the non-incented test. We also find evidence supporting the conclusion that the incentives crowd out intrinsic motivation to perform well on the non-incented test, but this effect is only temporary. One year later, students who had been in the incentives treatments perform better than those in the control on the same non-incented test.

Andreas Leibbrandt, John A List

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Labor force composition and the allocation of talent remain of vital import to modern economies. For their part, governments and companies around the globe have implemented equal employment opportunity (EEO) regulations to influence labor market flows. Even though such regulations are pervasive, surprisingly little is known about their impacts. We use a natural field experiment conducted across 10 U.S. cities to investigate if EEO statements in job advertisements affect the first step in the employment process, application rates. Making use of data from nearly 2,500 job seekers, we find considerable policy effects, but in an unexpected direction: the presence of an EEO statement dampens rather than encourages racial minorities willingness to apply for jobs. Importantly, the effects are particularly pronounced for educated job seekers and in cities with white majority populations. Complementary survey evidence suggests the underlying mechanism at work is "tokenism", revealing that EEO statements backfire because racial minorities avoid environments in which they are perceived as regulatory, or symbolic, hires rather than being hired on their own merits. Beyond their practical and theoretical importance, our results highlight how field experiments can significantly improve policy making. In this case, if one goal of EEO regulations is to enhance the pool of minority applicants, then it is not working.

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

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An active area of research within the social sciences concerns the underlying motivation for sharing resources and engaging in other pro-social actions. In this paper we ask: do parents model social preference behavior to children, and do children emulate this behavior? We develop a theoretical framework to examine this question, and conduct an experiment with 147 3 to 5 year old children and their parents, using dictator games to measure generosity. We find (1) evidence of parental teaching/modeling in the case of fathers and in that of parents of relatively generous children, and (2) an emulation effect such that children who initially share less than half of their endowment subsequently share more the more they see a parent or other adult share. We find little correlation between baseline sharing of children and the parents, with the possible exception of the oldest children.

Marvin Cardoza, Justin Holz, John A List, Alejandro Zentner, Joaquin Zentner

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This paper uses a natural field experiment to examine the effectiveness of specific nudges on tax compliance amongst firms and the self-employed in the Dominican Republic. In collaboration with the Dominican Republic's tax authority, we designed messages for more than 28,000 self-employed workers and over 56,000 firms. Leveraging administrative tax data, we find evidence that our nudges (increasing the salience of prison sentences or public disclosure of tax evaders) have large effects on increasing tax compliance, primarily working through the channel of decreasing claimed tax exemptions. Interestingly, we find that firms are more impacted than the self-employed, and that firm size is critically linked to nudge effectiveness: larger firms are considerably more influenced by nudges than smaller firms. We find this latter result noteworthy given the paucity of evidence showing significant behavioral impacts of nudges amongst the largest players in a market. Overall, our messages increased tax revenue by $193 million (roughly 0.23% of the Dominican Republic's GDP in 2018), with over $100 million constituting income that the government would not have received without our field experimental nudges.

Roland Fryer , Steven D Levitt, John A List, Anya Samek

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We present the results of a novel early childhood intervention in which disadvantaged 3-4-year-old children were randomized to receive a new preschool and parents education program focused on cognitive and non-cognitive skills (CogX) or to a control group that did not receive preschool education. In addition to a typical academic year (9 month) program, we also evaluated a shortened summer version of the program (2 months) in which children were treated immediately prior to the start of Kindergarten. Both programs, including the shortened version, significantly improved cognitive test scores by about one quarter of a standard deviation relative to the control group at the end of the year. The shortened version of the program was equally as effective as the academic-year program because most of the gains in the academic-year program occurred within the first few months.

John A List

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"Putting Economic Research into Practice at Businesses (to Inform Science and Major Social Challenges)" Slides from ASSA NABE

Christopher Cotton, Brent R Hickman, John A List, Joseph Price, Sutanuka Roy

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We conduct a field experiment across three diverse school districts to structurally identify student motivation and study productivity parameters in a model of adolescent human capital development. By observing study time, homework task completion, and test results, we can identify individual and demographic variations in motivation and study time effectiveness. Struggling students typically do not lack motivation but rather struggle to convert study time into completed assignments and proficiency improvements. The study also attending a higher-performing school is associated with both higher productivity and higher motivation relative to peers with similar observables in lower-performing schools. Counterfactual analyses estimates that school quality differences account for a substantial share of the racial differences in test scores, and considers the impact of alternative policies aimed at reducing racial performance gaps.

John A List

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In the past several decades academics and policymakers have grappled with how to augment the traditional classroom approach to enhance critical thinking skill formation. In this not, I take a different approach. I begin by developing a Critical Thinking Hierarchy, where from the bottom of the hierarchy upwards two key skills evolve: developing/assimilating empirical evidence to update one's beliefs (connecting the dots with empiricism) and putting the puzzle pieces together with conceptual reasoning (connecting the dots with abstract thought). Skills lower down in the hierarchy must be achieved before individuals can gain skills higher up. A key aspect of the CT skill formation process revolves around student's maturation from "fast thinking" to "slow thinking". My overall approach is useful because it at once defines critical thinking, pinpoints where improvements must be made for development, and provides a classroom playbook to enhance critical thinking skill formation.

Eliot Abrams, Jonathan Libgober, John A List

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The past few decades have ushered in an experimental revolution in economics whereby scholars are now much more likely to generate their own data. While there are virtues associated with this movement, there are concomitant difficulties. Several scientific disciplines, including economics, have launched research registries in an effort to attenuate key inferential issues. This study assesses registries both empirically and theoretically, with a special focus on the AEA registry. We find that over 90% of randomized controlled trials (RCTs) in economics do not register, only 50% of the RCTs that register do so before the intervention begins, and the majority of these preregistrations are not detailed enough to significantly aid inference. Our empirical analysis further shows that using other scientific registries as aspirational examples is misguided, as their perceived success in tackling the main issues is largely a myth. In light of these facts, we advance a simple economic model to explore potential improvements. A key insight from the model is that removal of the (current) option to register completed RCTs could increase the fraction of trials that register. We also argue that linking IRB applications to registrations could further increase registry effectiveness.

Marco Castillo, John A List, Ragan Petrie, Anya Samek

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We use field experiments with nearly 900 children to investigate how skills developed at ages 3-5 drive later-life outcomes. We find that skills map onto three distinct factors - cognitive skills, executive functions, and economic preferences. Returning to the children up to 7 years later, we find that executive functions, but not cognitive skills, predict the likelihood of receiving disciplinary referrals. Economic preferences have an independent effect: children who displayed impatience at ages 3-5 were more likely to receive disciplinary referrals. Random assignment to a parenting program reduced disciplinary referrals. This effect was not mediated by skills or preferences.

John A List

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All happy families are alike; each unhappy family is unhappy in its own way. -Leo Tolstoy, Anna Karenina

John A List, Ragan Petrie, Anya Samek

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In the past several decades the experimental method has lent deep insights into economics. One surprising area that has contributed is the experimental study of children, where advances as varied as the evolution of human behaviors that shape markets and institutions to how early life influences shape later life outcomes have been explored. We first develop a framework for economic preference measurement that provides a lens into how to interpret data from experiments with children. Next, we survey work that provides general empirical insights within our framework. Finally, we provide 10 tips for pulling off experiments with children, including factors such as taking into account child competencies, causal identification, and logistical issues related to recruitment and implementation. We envision the experimental study of children as a high growth research area in the coming decades as social scientists begin to more fully appreciate that children are active participants in markets who (might) respond predictably to economic incentives.

Erwin Bulte, John A List, Daan van Soest

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Incomplete contracts are the rule rather than the exception, and any incentive scheme faces the risk of improving performance on incented aspects of a task at the detriment of performance on non-incented aspects. Recent research documents the effect of loss-framed versus gain-framed incentives on incentivized behavior, but how do such incentives affect overall performance? We explore potential trade-offs by conducting field experiments in an artificial "workplace". We explore two types of incentive spillovers: those contemporaneous to the incented task and those subsequent to the incented task. We report three main results. First, consonant with the extant literature, a loss aversion incentive induces greater effort on the incented task. Second, offsetting this productivity gain, we find that the quality of work decreases if quality is not specified in the incentive contract. Third, we find no evidence of harmful spillover effects to subsequent tasks; if anything, the loss aversion incentive induces more effort in subsequent tasks. Taken together, our results highlight that measuring and accounting for incentive spillovers are important when considering their overall impact.

Erwin Bulte, John A List, Daan van Soest

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Social scientists have recently explored how framing of gains and losses affects productivity. We conducted a field experiment in peri-urban Uganda, and compared output levels across 1000 workers over isomorphic tasks and incentives, framed as either losses or gains. We find that loss aversion can be leveraged to increase the productivity of labor. The estimated welfare costs of using the loss contract are quite modest -- perhaps because the loss contract is viewed as a (soft) commitment device.

Omar Al-Ubaydli, John A List

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This is a review of the literature of field experimental studies of markets. The main results covered by the review are as follows: (1) Generally speaking, markets organize the efficient exchange of commodities; (2) There are some behavioral anomalies that impede efficient exchange; (3) Many behavioral anomalies disappear when traders are experienced.

Annika List, John A List, Anya Samek

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Social scientists for years have documented the pervasiveness of discrimination in product and labor markets. While the literature has recently attempted to measure the nature of such discrimination, much less work has been done exploring the origins of discrimination. We make a modest step in this direction by reporting data from a field experiment attempting to measure discrimination amongst 3-5 years olds. Using a design that isolated discriminatory behaviors in economic games, we find that both White and Hispanic children send more resources to Black children than White children, whereas black children send equal amounts. This provides a first glimpse that suggests preferences amongst the young do not show similar patterns as preferences of adults.

Greer K Gosnell, John A List, Robert D Metcalfe

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Increasing evidence indicates the importance of management in determining firms' productivity. Yet, causal evidence regarding the effectiveness of management practices is scarce, especially for high-skilled workers in the developed world. In an eight-month field experiment measuring the productivity of captains in the commercial aviation sector, we test four distinct management practices: (i) performance monitoring; (ii) performance feedback; (iii) target setting; and (iv) prosocial incentives. We find that these management practices -particularly performance monitoring and target setting- significantly increase captains' productivity with respect to the targeted fuel-saving dimensions. We identify positive spillovers of the tested management practices on job satisfaction and carbon dioxide emissions, and captains overwhelmingly express desire for deeper managerial engagement. Both the implementation and the results of the study reveal an uncharted opportunity for management researchers to delve into the black box of firms and rigorously examine the determinants of productivity amongst skilled labor.

Alec Brandon, John A List, Robert D Metcalfe, Michael K Price, Florian Rundhammer

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This study considers the response of household electricity consumption to social nudges during peak load events. Our investigation considers two social nudges. The first targets conservation during peak load events, while the second promotes aggregate conservation. Using data from a natural field experiment with 42,100 households, we find that both social nudges reduce peak load electricity consumption by 2 to 4% when implemented in isolation and by nearly 7% when implemented in combination. These findings suggest an important role for social nudges in the regulation of electricity markets and a limited role for crowd out effects.

Gary Charness, John A List, Aldo Rustichini, Anya Samek, Jeroen van de Ven

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Theory of Mind (ToM), the ability to correctly attribute mental states to others, is important in social interactions. We evaluate the development of ToM in about 800 mostly disadvantaged children. We next conduct a field experiment with about 160 children in which we find that the low ToM rates for these disadvantaged children improve substantially in environments where the presence of other children is made salient. We see that ToM performance increases for both younger and older children in the treatment with strong salience, but that the treatment with weaker salience seems to be only effective in improving the ToM rates for older children.

John A List

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In 2019, I put together a summary of data from my field experiments website that pertained to natural field experiments. Several people have asked me if I have an update. In this document I update all figures and numbers to show the details for 2022. I also include the description from the 2019 paper below.