Jan Marcus

This year I joined the editorial team of @jcre.bsky.social, the Journal of Comments and Replications in Economics (JCRE) as a Co-Editor. I'm especially happy that the first submission I handled from start to finish has now been published—together with a reply from the original authors.

Looking for 125 researchers to participate in virtual forensic AI games! We will give you an AI report that documents irregularities in sports/exercise related articles. Also releasing our open source new I4R AI Audit Protocol. Details in this 🧵. Join us!

Our chair and a few replicators investigated a paper about elite footballers. And missed the bigger story. An independent researcher showed us what we had failed to see. This is I4R’s CRAVE–football investigation. It starts with a PNAS paper. #CRAVEFiles

Can we trust the scientific evidence guiding policies to fight tropical diseases? The Institute for Replication is organizing Replication Games focused on tropical disease research at #TropMed26! 📅 November 18, 2026 📍 Washington, DC area + virtual participation 🧵👇

📢 1 week left! Submit your work to the BeNA Labor & Education Economics Workshop on Nov 27 at FU Berlin! PhD students: Present your research, get feedback & exchange ideas. Early-stage projects welcome! ⏰ Deadline: Oct 1 📩 workshop@labor-research.net #EconSky #BeNA

Right now, a replication can exist and still be almost invisible to someone reading the original paper. That makes it harder for researchers, reviewers, students, journalists, and policymakers to know what evidence has accumulated around a finding.

Episode 2 from our 1-day I4R workshop is out. @janmarcus.de, @josefinaw.bsky.social & René Bekkers ask: How can we link publications to replications, so anyone reading a paper can instantly see whether its findings have been retested? 🧵

Want to learn more about modern diff-in-diff estimators? Check out this forthcoming lecture series with Xavier D'Haultfoeuille. Registration still open!

Wie haben wirtschaftliche Sorgen und Migration die Landtagswahl in Sachsen-Anhalt geprägt? Und welche Wirtschaftspolitik wäre von einer AfD-Regierung zu erwarten? Dazu ein kurzes Interview.

We have an excellent line-up for our Leibniz Open Science Day on Nov 17 in Berlin - including an exciting keynote by Felix Holzmeister. Come join us and catch up on the latest in meta-scientific research! www.zbw.eu/de/ueber-uns...

Check out this new paper in @jcre.bsky.social !

🚨🚨🚨 Call for submissions for the first special issue of @jcre.bsky.social Anyone can submit replications on the topic of payments for ecosystem services. Details below 👇

🚨 CORRIGENDUM ALERT 🚨 A decade after Star Wars: The Empirics Strike Back was published in AEJ: Applied, we've just published an official corrigendum with the AEA. This is a love story. 🧵

📢 Call for Papers! We are partnering with the Journal of Economic Surveys on a special issue: Reproducibility and Meta-Science in Economics. Submission deadline: 1 March 2027. Details in thread 🧵

Looking forward to have you at FU, Kamila @cyganrehm.bsky.social!

Our next Leibniz Open Science Day is coming up on Nov 17 in Berlin! Submit your paper if you do research on science. We welcome submissions across all areas of meta-science. Keynote by @flxhlzmstr.bsky.social! www.zbw.eu/en/about-us/...

🗓️ Thursday, July 9: We are very happy to have Alfred Guender at the Reasearch Seminar in Economics at @freieuniversitaet.bsky.social. He will present his work on „Financial Openness: Where It Matters for CPI Inflation and Where It Does Not“. #EconFUBerlin #RseFUBerlin #EconSky

⚽ Deutschland gewinnt in 90 Minuten mit 60% 🙌 Das Team spielt Unentschieden mit 23%, verliert mit 16%. Am wahrscheinlichsten ist 1:0 für Deutschland, aber auch ein 2:0 hat eine ähnlich hohe Wahrscheinlichkeit. ➡️ Zur Prognose des FB Wirtschaftswissenschaft www.fu-berlin.de/wm2026 #WM2026

Looking forward to having @jrgptrs.bsky.social in our research seminar this Thursday! Feel free to join. 12.15 Boltzmannstraße 20.

The debate about Borjas/Breznau's paper on ideological bias in migration research is out now @i4replication.bsky.social. With a comment by Katrin Auspurg & Josef Brüderl: hdl.handle.net/10419/341575 And a reply by the original authors: hdl.handle.net/10419/341576

There’s been a lot of buzz around the Borjas/Breznau (2026) paper (www.science.org/doi/10.1126/...) and potential ideological bias in research. We took a closer look at the data. Could there be a "bias in bias research"? Here is what we found: www.econstor.eu/bitstream/10...

Es hat mir viel Spaß gemacht meine Erfahrungen mit der Co-Organisation der Berlin Replication Games 2025 im Podcast von @zbw-leibniz.bsky.social mit #DoreenSiegfried zu teilen. Replication Games zeigen, wie wertvoll gemeinsames Arbeiten an Replikationen und Reproduktionen sein kann!

🗓️ Thursday, June 18: We are very happy to have Jordan Norris at the Reasearch Seminar in Economics at @freieuniversitaet.bsky.social. He will present his work on „Bounding High Dimensional Comparative Statics“ #EconFUBerlin #RseFUBerlin #EconSky

🗓️ Thursday, June 11: We are very happy to welcome Andreas Knabe at the Research Seminar in Economics at @freieuniversitaet.bsky.social. He will present his work on „Income and Well-Being“ #EconFUBerlin #RseFUBerlin #EconSky

Big thanks to all participants of the 4th FUB Internal PhD Workshop in Applied Micro. @fu-berlin-vwl.bsky.social. Co-organized with @danzernatalia.bsky.social, @steinhardt.bsky.social, @janmarcus.de. Lots of exciting research projects! 👏👏

1/ Can AI help researchers check whether published social science results actually reproduce? In our new PNAS paper, we tested this directly in the AI Replication Games: 288 researchers, 103 teams, and real replication packages from quantitative social science.

🚨 New AI Games round is live 🚨 Our first AI Games paper is now out at a top general interest journal (see preprint here: www.econstor.eu/bitstream/10... So… we’re launching the next stage 👇

🗓️ Thursday, May 28: We are very happy to have Miguel Alquézar-Yus at the Reasearch Seminar in Economics at @freieuniversitaet.bsky.social. He will present his work on „The Reversal of the Mission: The Influence of Religious Leaders on Sociopolitical Attitudes“ #EconFUBerlin #RseFUBerlin #EconSky

🗓️ Thursday, May 21: We are very happy to welcome Celine Poilly at the Research Seminar in Economics at @freieuniversitaet.bsky.social. She will present her work on „The Variety Effect in Times of Uncertainty“ #EconFUBerlin #RseFUBerlin #EconSky

📘 Scott Cunningham joins @diw.de on June 15–16, 2026 for the Causal Inference – The Mixtape Master Class 2026 on Difference-in-Differences and Synthetic Control methods. Registration is open until June 1, 2026: docs.google.com/forms/d/e/1F... #causalinference #economics

🗓️ Thursday, May 7: We are very happy to have Sylvia Klosin at the Reasearch Seminar in Economics at @freieuniversitaet.bsky.social. She will present her work on „Dynamic Biases of Static Panel Data Estimators“ #EconFUBerlin #RseFUBerlin #EconSky

🗓️ Thursday, April 30: We are very happy to welcome Ruediger Bachmann (@bachmannrudi.bsky.social) at the Research Seminar in Economics at @freieuniversitaet.bsky.social. He will present his work on „The Housing Channel of Labor Market Turnover“ #EconFUBerlin #RseFUBerlin #EconSky

With the start of the new semester, the Research Seminar in Economics returns!🎉 Every Thursday, guest speakers will share their latest research on various topics. Pieter Bakx will open the seminar by presenting his research on „Physician prescribing style and the economic cost of health shocks“

Happy start to the new term! Wishing all our students and colleagues an inspiring and successful semester at the @jfki-econ.bsky.social and @fu-berlin-vwl.bsky.social.

📣 We’re excited to spotlight a compelling new collection of research published in nature, exploring replication, robustness, and reproducibility across the behavioral and social sciences.

Looking forward to teaching this @gesistraining.bsky.social course next year on Feb 16-17. (Registration) details below 👇

BeNA is an invaluable network providing free events to the applied micro community, thanks to our sponsors at the Berlin econ research institutes. Super happy to help shape its future as a new board member in the coming years! Huge thanks to the outgoing board 🙏