Duncan Webb

Duncan Webb

@duncanwebb.bsky.social

Development economics postdoc @ Princeton, incoming Assistant Prof @ NOVA SBE, focusing on discrimination, social change, and human capital www.duncan-webb.com

1K followers204 following26 posts

Can menstruation be a barrier to girls' learning in low-income settings? We've been studying this for the last few years (since early PhD days!) in Madagascar in partnership with @CARE Madagascar / CARE France. 🧵

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Huge thanks to my amazing co-authors Karen Macours and Julieta Vera Rueda, to Maya Iannuzzi and Oscar Diaz, to CARE Madagascar and CARE France, and to our field team who tracked down girls across half the country.

Can menstruation be a barrier to girls' learning in low-income settings? We've been studying this for the last few years (since early PhD days!) in Madagascar in partnership with @CARE Madagascar / CARE France. 🧵

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Instead, we think the key to the program's success is that it reduces the stigma around menstruation and improves the school's psychosocial climate more broadly. Girls feel less stressed (their heart rates are lower at endline!) and experience less severe bullying.

Can menstruation be a barrier to girls' learning in low-income settings? We've been studying this for the last few years (since early PhD days!) in Madagascar in partnership with @CARE Madagascar / CARE France. 🧵

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Two teachers per school run a 5-minute session every week on menstruation, and a few girls in each school are nominated as "Young Girl Leaders" to champion menstrual hygiene among their classmates.

We find this program led to pretty big (+0.15-0.25 SD) improvements in girls' math & literacy, even though the program doesn't focus on academics at all, and even though we didn't see any measurable improvements in physical health or school attendance.

Can menstruation be a barrier to girls' learning in low-income settings? We've been studying this for the last few years (since early PhD days!) in Madagascar in partnership with @CARE Madagascar / CARE France. 🧵

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So even when girls do have access to products, they may not feel comfortable using them, and they may still feel stressed and embarrassed and so not be able to concentrate on their studies.

So in Madagascar, CARE has been running a program whose main aim is to get people talking about periods, while also dealing with the practical side: latrines and basins in schools, reusable pads, and basic hygiene knowledge.

Can menstruation be a barrier to girls' learning in low-income settings? We've been studying this for the last few years (since early PhD days!) in Madagascar in partnership with @CARE Madagascar / CARE France. 🧵

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Can menstruation be a barrier to girls' learning in low-income settings? We've been studying this for the last few years (since early PhD days!) in Madagascar in partnership with @CARE Madagascar / CARE France. 🧵

We found that yes - a school program that tackles the stigma and practical constraints around periods can substantially improve learning, but perhaps not for the reason we would have guessed going in...

🔥Very cool paper showing that women in India are way more likely to take up a job (↑29%) in a female-only workplace, and that this can be explained by husbands' jealousy/desire for control. These are massive effects, equivalent to 2.5x increases in wage bit.ly/4nn9apn

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Good morning with good news: India meets 50% renewables & nuclear capacity target 5 years early! As clean capacity deploys, clean electricity production surges. Solar grew from 5 TWh in 2014 to 48 TWh in 2019 & 137 TWh in 2024. Hydro was 157 TWh; wind 82 TWh; nuclear 55 TWh in 2024. #energysky

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In the last decades, the world has made fantastic progress against extreme poverty. In 1990, 2.3 billion people lived in extreme poverty. Since then, the number of extremely poor people has declined by 1.5 *billion* people. 🧵

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Dropping a beta version of this page while everyone is up and processing baseball! This tool lets you search the full text of papers from the American Economic Review, American Economic Journal series, and over 30,000 NBER working papers. paulgp.com/econlit-pipe...

paulgp.comEconomics Literature SearchFull-text search across 15,000+ papers from top economics journals and NBER working papers. Track how empirical methods have evolved over time.

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HOLY SHIT they did it!!!!!!!!!!!!!!!!!!!!

Florian Scheuer@florianscheuer.bsky.social

I am delighted to share that Nobel laureates Esther Duflo and Abhijit Banerjee will join our Department of Economics @econ.uzh.ch at the University of Zurich on July 1, 2026, as Lemann Foundation Professors of Economics. 🧵 1/7

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On one hand, reducing car use reduces urban pollution. But on the other, everyone likes it and cities become more livable

Brent Toderian@brenttoderian.bsky.social

“Over the past 20 years, Paris has undergone a major physical transformation, trading automotive arteries for bike lanes, adding green spaces and eliminating 50,000 parking spaces. Part of the payoff has been invisible — in the air itself.” Leadership, strategy, real action, common sense. #Paris

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🎙️ In a recent @voxdev.bsky.social talk, NOVAFRICA Scientific Director @catiabatista.bsky.social & Caroline Theoharides discuss key findings from their @science.org paper: “Brain Drain or Brain Gain? The Impact of High-Skilled Migration on Origin Countries.” 🔗 voxdev.org/topic/migrat...

voxdev.orgWhy ‘Brain Drain’ is an incomplete story of migrationThe migration of high-skilled workers, sometimes referred to as 'brain drain', is usually seen as negative for origin countries. New research suggests this is an incomplete story—highlighting the chan...
VoxDev@voxdev.bsky.social

🆕 Why ‘Brain Drain’ is an incomplete story of migration 📢 Today on VoxDevTalks, @catiabatista.bsky.social (@novafrica.bsky.social) & Caroline Theoharides (Amherst College) discuss the channels through which emigration can benefit origin countries: voxdev.org/topic/migrat...

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We ran a randomized controlled trial to see how much AI coding tools speed up experienced open-source developers. The results surprised us: Developers thought they were 20% faster with AI tools, but they were actually 19% slower when they had access to AI than when they didn't.

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Replying to @billgates.bsky.social

Since 2000, Gavi has helped get vaccines to 1.1 billion children. The U.S. announced that, after this year, it’s pulling out all its money. If that happens, Gavi estimates that 75 million children will miss vaccinations over the next five years—and of those, 1.2 million children will die.​

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USAID has spent $2 billion supporting vaccines through GAVI. In research, published in AEJ:Economic Policy, Kartini Shastry and I find GAVI saved 1.5 million lives at a low cost of $9,000 per child saved. See the writeup of our research in VoxDev: voxdev.org/topic/health...

voxdev.orgEffective health aid: Evidence from Gavi’s vaccine programmeCoordinated health aid for vaccination has increased coverage rates and saved the lives of children around the world.

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The global vaccine campaign GAVI saved 1.5 million lives so far, as economists @dantortorice.bsky.social and Kartini Shastry have shown. Now the US Administration, captured by anti-vaccine zealots, will cancel *all* funding for GAVI. www.nytimes.com/2025/06/25/h... An act of mass death.

Dan Tortorice@dantortorice.bsky.social

USAID has spent $2 billion supporting vaccines through GAVI. In research, published in AEJ:Economic Policy, Kartini Shastry and I find GAVI saved 1.5 million lives at a low cost of $9,000 per child saved. See the writeup of our research in VoxDev: voxdev.org/topic/health...

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This is a travesty & a nightmare. The US was a founder of @gavi.org. It lowers global vaccine costs, has vaccinated 1B children, & averted 19M deaths. This pull out will cost 100s of thousands of children's lives a year - and RFK Jr will be personally responsible. www.politico.com/news/2025/06...

politico.comRFK Jr. says US won’t donate to global vaccine effortKennedy ripped into Gavi, the Vaccine Alliance, in a video address at its pledging summit.

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The CBO has analyzed the distributional impacts of H.R. 1, a.k.a. the One Big Beautiful Bill Act. Household resources for the bottom income decile would fall by 4% ($1,600), largely due to Medicaid & SNAP cuts. The top income decile will see increases of 2.3% ($12,000), largely due to tax cuts.

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At Princeton today to celebrate the career of the brilliant and generous Janet Currie, a pioneer in the economics of children. I and the many researchers in this audience wouldn't be where we are if not for her mentorship.

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Nature ran a piece finding that 25 million people could die as a result of ending USAID. This puts Trump and Musk in the category of the most brutal leaders of the 20th century in terms of unnecessary lives lost. www.nature.com/articles/d41...

Zack Beauchamp@zackbeauchamp.bsky.social

If this is even remotely accurate, Elon Musk and Donald Trump have killed more people in several months than the Iraq war killed in a decade

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The obliteration of this survey is a terrible loss to social science.

Jasmin Abdel Ghany@jasminabdelghany.bsky.social

The Demographic and Health Survey (DHS) Program was central in improving the evidence base for health policies and interventions, particularly in Sub-Saharan Africa and Central & Southern Asia - figure by @aasli.bsky.social. Our preprint on the termination of the DHS Program: osf.io/preprints/so...

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🧵 (1/6) ‪Tax Policy Center, @budgetlab.bsky.social‬@taxpolicycenter, and PennWharton all have new analyses of the House bill; they paint a remarkable picture of a starkly regressive bill. Cuts to Medicaid/SNAP exacerbate the regressive pattern of the tax increases, making quite a picture.