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Individuals care about how they are perceived by others, and take visible actions to signal their type. This paper investigates social signaling in the context of childhood immunization in Sierra Leone. Despite high initial vaccine take-up, many parents do not complete the five immunizations that are required in a child’s first year of life. I introduce a durable signal - in the form of differently colored bracelets - which children receive upon vaccination, and implement a 22-month-long experiment in 120 public clinics. Informed by theory, the experimental design separately identifies social signaling from leading alternative mechanisms. In a first main finding, I show that individuals use signals to learn about others’ actions. Second, I find that the impact of signals varies significantly with the social desirability of the action. In particular, the signal has a weak effect when linked to a vaccine with low perceived benefits and a large, positive effect when linked to a vaccine with high perceived benefits. Of substantive policy importance, signals increase timely and complete vaccination at a cost of approximately 1 USD per child, with effects persisting 12 months after the roll out. Finally, I structurally estimate a dynamic discrete-choice model to quantify the value of social signaling.

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Working Paper
Date:
December 12, 2018
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We evaluate an intervention to raise young women’s economic empowerment in Sierra Leone, where women frequently experience sexual violence and face multiple economic disadvantages. The intervention provides them with a protective space (a club) where they can …nd support, receive information on health/reproductive issues and vocational training. Unexpectedly, the post-baseline period coincided with the 2014 Ebola outbreak. Our analysis leverages quasi-random across-village variation in the severity of Ebola-related disruption, and random assignment of villages to the intervention to document the impact of the Ebola outbreak on the economic lives of 4 700 women tracked over the crisis, and any ameliorating role played by the intervention. In highly disrupted control villages, the crisis leads younger girls to spend signi…cantly more time with men, out-of-wedlock pregnancies rise, and as a result, they experience a persistent 16pp drop in school enrolment post-crisis. These adverse e¤ects are almost entirely reversed in treated villages because the intervention enables young girls to allocate time away from men, preventing out-of-wedlock pregnancies and enabling them to re-enrol in school post-crisis. In treated villages, the unavailability of young women leads some older girls to use transactional sex as a coping strategy. The intervention causes them to increase contraceptive use so this does not translate into higher fertility. Our analysis pinpoints the mechanisms through which the severity of the aggregate shock impacts the economic lives of young women, and shows how interventions in times of crisis can interlink outcomes across younger and older cohorts. J

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Working Paper
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December 01, 2018
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This paper presents an experimental approach to measure competition in agricultural markets, based on the random allocation of subsidies to competing traders. We compare prices of subsidized and unsubsidized crop traders to recover the key market structure parameter in a standard model of imperfect competition. By combining the experimental results with quasi-experimental estimates of the pass-through rate, we also estimate market size, or the effective number of traders competing for farmers’ supply. In the context of the Sierra Leone cocoa industry, our results point to a competitive agricultural trading sector and suggest that the market size is substantially larger than the village. The methodology developed in this paper uses purely individual-level treatment to shed light on market structure. This approach may be useful for the many cases in which market-level randomization is not feasible.

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Working Paper
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April 01, 2017
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Most wars today are civil wars, which divide countries along economic, ethnic or political lines. In many cases, these cleavages happen within communities, pitting one neighbor against another. The prevalence of civil wars has therefore spurred efforts to re-build social cohesion and promote social capital as a part of post-conflict recovery.

Truth and reconciliation processes are a common approach used across the world to promote this type of societal healing. These processes bring war victims face-to-face with perpetrators in forums where victims describe war atrocities, and perpetrators confess to war crimes without facing punishment. Proponents of reconciliation processes claim that they are highly effective – not only in rebuilding social ties among individuals and promoting societal healing, but also in providing psychological relief and aiding individual healing. Yet, there is little rigorous evidence of whether, and how, reconciliation processes help communities heal from conflict.

To shed light on this topic, researchers from New York University, Georgetown University and the World Bank partnered with Innovations for Poverty Action (IPA) to evaluate the impact of a community-level reconciliation program in Sierra Leone.

The results suggest that talking about war atrocities can prove psychologically traumatic by invoking war memories and re-opening old war wounds. The researchers conclude that reconciliation programs should to be re-designed in ways that minimize their psychological costs, while retaining their societal benefit.

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Brief
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May 05, 2016
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Debates between candidates for public once have a rich historical tradition and remain an integral part of contemporary campaign strategy. There is, however, no definitive evidence of whether debates affect actual voting behavior. Limited media penetration implies that the effects of publicizing debates could be more pronounced, persistent and directly linked to electoral outcomes in the developing world. We experimentally manipulate citizen exposure to debates between Parliamentary candidates in Sierra Leone to measure their impacts on, and the interconnections between, voter behavior, campaign spending, and the performance of elected politicians. We find evidence of strong positive impacts on citizen political knowledge, policy alignment and votes cast on Election Day. We then document an endogenous response by participating candidates, who increased their campaign expenditure in communities where videotapes of the debates were screened in large public gatherings. A complementary series of individual treatment arms unpacks the different types of information delivered by the debates, and finds evidence that voters respond to both candidate charisma and "hard facts" about policy stance and professional qualifications. Lastly, we find longer term accountability effects on elected MPs, where participation in debates led to higher levels of constituency engagement and development expenditure during their first year in once.

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Working Paper
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June 19, 2015
English

Interlinked transactions in which output prices are determined jointly with the terms of a credit contract are an important feature of many business relationships, particularly in developing economies. We present results from a randomized experiment designed to study how value is passed along the agricultural supply chain in the presence of such interlinkages. In response to an increase in a trader’s wholesale price, we find limited pass-through of the price to farmers. However we also find a large increase in the likelihood that traders provide credit to farmers, suggesting that the value of the wholesale price increase was passed to farmers along a different margin. We develop a model of interlinked transactions that shows how price and credit passthrough are determined, and verify its predictions empirically. Our work suggests that the presence of interlinkages is a candidate explanation for low rates of price pass-through that have been observed, but one with substantially different implications for welfare than others.

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Working Paper
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June 17, 2015

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