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By running a Facebook public health campaign, researchers found that social media messaging from doctors and nurses reduced holiday travel and subsequent Covid-19 infection rates. This suggests that social media campaigns may be an impactful and cost-effective way to slow the spread of Covid-19 and...

Researchers evaluated whether the ethnicities of wholesale buyers and sellers in Chennai, India, affected the transaction terms. They found that traders offered lower prices to buyers of the same ethnicity, but not necessarily because they trusted them more.

Researchers evaluated the impact of additional investments in agriculture on income for subsistence farmers. In rural Mali, giving some farmers unrestricted cash grants led to significantly higher productivity and profits, suggesting farmers would invest more in their farms if they had more capital.

La distribución de cisternas de agua en el noreste de Brasil llevó a un menor número solicitudes de beneficios privados a políticos locales y menos votos para los alcaldes y alcaldesas en ejercicio, quienes generalmente tienen más recursos para involucrarse en clientelismo. Marco González-Navarro y...