Andreas Kotsadam

Development programs in war zones Did development aid in Afghanistan help counter the Taliban’s insurgency?

Development aid can help suppress insurgencies, but it may be counterproductive in areas where insurgents came from outside of local communities, say researchers at @theworldbank.bsky.social, @mit.edu, and @upf.edu. #econsky www.aeaweb.org/research/dev...

Fascinating new paper shows that papers reporting statistical significance get at least 60% more media attention #econtwitter #econsky: from
Brodeur Cook @nikolaimcook @taylor_wright, a short 🧵

🚨 New research alert! 🚨

Check out this recent paper by Johannes Bergh, Dag Arne Christensen and @finseraas.bsky.social on the impact of early voting on partners mobilisation. Available open access here: www.sciencedirect.com/science/arti...

New preprint out with @aleksandermadsen.bsky.social, where we show that later-arriving childhood immigrants have lower earnings, are more likely to enter manual occupations, and are less likely to enter analytical and language-intensive jobs and be employed in high-wage firms as adults.

"It's the economy, stupid"

Voters vote based on the economy.

But there are many economic performance indicators. Which matter the most?

This new paper shows voters react to growth, unemployment, inflation, & stock markets.

But the inflation plays the biggest role.

www.ifau.se/globalassets...

10 Conversations that Implementers and Evaluators Need to Have buff.ly/9lWzMqZ #EGAPMethodsGuide

Do family-friendly hours make it easier for women politicians to participate in meetings? 🕚

In a new working paper, I find they don’t. 🧵1/10

Update #2, RETRACTED: 15 months after we (w @ollefolke.bsky.social and @johannarickne.bsky.social ) submitted the initial comment to the Journal, we've noticed the paper was ultimately retracted. Retraction note here: link.springer.com/article/10.1...

Important paper from @anderskjelsrud.bsky.social and Sahar!

Every authoritarian who successfully destroyed judicial independence did so because civil society failed to unite in time. The key difference? Whether people mobilized.

🧵 When authoritarian leaders attack judges as "enemies," history shows us exactly where this leads. Trump's assault on "USA HATING JUDGES" isn't just inflammatory rhetoric—it's following a script written by strongmen worldwide. But other countries show us how to fight back.

Indeed

After one year of waiting, we finally got a response from the Journal of Population Economics about our replication of "Banning the purchase of sex increases cases of rape: evidence from Sweden", confirming the major coding error that invalidates the main results, but not retracting the paper. 1/2

A re-analysis of Ciacci's (2024) "Banning the purchase of sex increases cases of rape: Evidence from Sweden" Journal of Population Economics reveals major issues. A year ago, reproducers Adema, Folke, and Rickne found coding errors driving the paper's key results. Let's unpack this in a 🧵

🚨 REPLICATION REPORT UPDATE: One year ago, a tweet by John Holbein alerted me, @ollefolke.bsky.social, and @jopieboy.bsky.social to a paper with a shocking result about Sweden’s law criminalizing the purchase of sex.🧵

9/ Based on our initial and extended replications, we wonder: how can the editor still trust the results of this paper? If this case does not meet the criteria for retraction, what does?

10/ Please help share our extended replication to correct the record on this misleading policy evaluation!

Full replication text here: www.econstor.eu/handle/10419...

🚨 New #EconHistory research alert!
Our paper “Strikes & Machines: Investment decisions in inter‑war Norway” conditionally accepted in Journal of Economic History ask
"What did strike threats really do to technology?"
👇 1/6

Replication probe finds ‘statistically improbable data’ tied to institute in Bangladesh Asad Islam A Bangladesh-based organization focused on development economics and its founder have been churning out papers filled with misstatements, inconsistencies, ethical lapses and “statistical…

The Islam - GDRI saga is gaining some traction.

retractionwatch.com/2025/04/10/r...

I was on the Good on Paper podcast at the Atlantic discussing a paper joint with Cody Tuttle and Jorg Spenkuch:

Previously I did a lit 🧵 the other site around evidence of effects of weather shocks on IPV: re-upping that here, and with some exciting new additions! #econsky

Papers published in Psych Science following January 1st, 2024 are candidates for I4R to computationally reproduce, stress-test and replicate. This is an official collaboration with @psychscience.bsky.social.

journals.sagepub.com/doi/10.1177/...

We are looking for reproducers and replicators!

“Try to balance the baseline”: A comment on “parent-teacher meetings and student outcomes: Evidence from a developing country” by Islam (2019) Islam (2019) reports results from a randomized field experiment in Bangladesh that examines the effects of parent-teacher meetings on student test sco…

Great to see our comment now available online in the European Economic Review! (w/ @carlbonander.bsky.social, @nikljako.bsky.social, @flxhlzmstr.bsky.social, Gunther Bensch & Abel Brodeur @i4replication.bsky.social) 🙌

Do Funds for More Teachers Improve Student Outcomes? Nicolai T. Borgen, Lars J. Kirkebøen, Andreas Kotsadam and Oddbjørn Raaum We investigate the effects of a large-scale Norwegian intervention that provided extra teachers to 166 lower secondary schools with relatively high student-teacher ratios and low average grades. We exploit these two margins using a regression discontinuity setup and find that the intervention reduced the student-teacher ratio by around 10%, without crowding out other school resources. The extra funding did not improve test scores and medium-term academic outcomes, and we can reject even small positive effects. We do find that more teachers improved the school environment, including self-reported student well-being, but with the largest impact on aspects of the school environment most weakly associated with better academic outcomes.

A study by Nicolai T. Borgen, Lars J. Kirkebøen, @kotsadam.bsky.social, and @oraaum.bsky.social found that funding 600 extra teachers cut the student-teacher ratio by 10%, boosted student well-being and the school environment, but did not improve academics.
doi.org/10.3368/jhr....

#GDRI_rep Update 7: Retraction! Our comment of "Parent–teacher meetings and student outcomes: Evidence from a developing country" has led to the paper being retracted. Our comment is accepted as is.

Short 🧵

I am very happy that the editors took our report seriously. Hope more retractions will follow.

#GDRI_rep Update 6: Some of the authors have responded to our report on "Raising Health Awareness in Rural Communities" @ The Review of Economics and Statistics. Authors received our report Feb 6. A short 🧵

In Ethiopia, random offers of employment to women have no effect on physical intimate partner violence, either positive or negative - but a 26% reduction in emotional IPV @kotsada @kotsadam.bsky.social
jhr.uwpress.org/cont...

Debatt: Støres regjering er balansert på kjønn. Men hvor er distriktene og arbeiderklassen? Manglende balanse har konsekvenser for hvilke saker og temaer som løftes opp på Stortingets talerstol.

Støres regjering er balansert på kjønn. Men hvor er distriktene og arbeiderklassen?

@nedregardoda.bsky.social, Henning og jeg skriver i DN om vårt paper som er under publisering Journal of Politics www.jon.fiva.no/docs/FivaNed...

www.dn.no/innlegg/poli...

We've just opened registration to 6 replication games: i4replication.org/games.html

Montreal (May 28-all)
San Francisco (June 19-econ)
Madrid (June 25-all)
Bordeaux (August 24-econ)
Paris (October 3-all)
Lyon (October 9-all)

🧵 with more details.