Joop Adema

@jopieboy.bsky.social

Post-doc @ University of Innsbruck -- https://jopieadema.github.io/

Social science research is slow: a policy changes, we wait for data, write it up, submit it -- and by publication the debate has moved on. I don't think that has to be true anymore. Introducing Living Research: real-time policy evaluation that updates itself. 🧵

This smells distinctly like collider bias and/or selection bias and/or regression to the mean... You simply can't select teen prodigies, and world class athletes rom databases, and go run regressions without serious consideration of the selection process!

Mike Inouye@mikeinouye.bsky.social · 8mo ago

"Most top achievers (Nobel laureates and world-class musicians, athletes, chess players) demonstrated lower performance than many peers during their early years. Across the highest adult performance, peak performance is negatively correlated with early performance" www.science.org/doi/10.1126/...

🧵 Prior work studied the effect of (refugee) migration on far-right voting, but local inflows can only explain a sliver of the increase in FR voting around refugee waves. In my new WP, find that increased EXPECTATIONS about future migration causally increased FR voting in the Netherlands!

Our CampAIgn Tracker got featured in this brilliant piece of investigative journalism by @groene.nl. They reveal the prompts behind an extremely disturbing AI-powered campaign by Dutch politicians that we find is one of the top producers & spreaders of AI-generated content in this election #tk2025.

Claes de Vreese@claesdevreese.bsky.social · 10mo ago

Wordt generatieve AI gebruikt door politieke partijen en aanhangers? Ja. Maar vooral door sommige partijen. Zie uitgebreid stuk ik de @groene.nl met belangrijke bijdragen van Jelle Postma en collega @favstats.eu #tk2025 www.groene.nl/artikel/maak...

(1/10) New paper at PNAS: what predicts Ukrainian refugees’ destination choice? We experimentally study the drivers of location choice in a conjoint design: we find that job opportunities, wages and networks are most important, much more so than welfare benefits.

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🧵Replication: Can refugee flows be lowered by reducing welfare? Agersnap et al. (2020, AER:I) study this in Denmark, reporting lower benefits strongly reduce migration flows. I reanalyze this paper, finding a much more nuanced result.

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Update: We submitted the comment to the Journal of Population Economics, and today we got a desk reject with this motivation. However, we do not know their conclusion about the main results and why the paper was not retracted. Clearly, they do not hold. 1/4

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Johanna Rickne@johannarickne.bsky.social · last yr.

🚨 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.🧵

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 🧵

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