Jan Marcus
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Jan Marcus
@janmarcus.de
2.5K followers 560 following 72 posts

Professor for Applied Statistics, Freie Universität Berlin; education and health economist; table tennis player

http://janmarcus.de

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janmarcus.de
Jan Marcus @janmarcus.de · Nov 29
🧵 Excited to share: "Replication Code Availability over Time and Across Fields", was just accepted by #EconomicInquiry! 🚀 Here's what @lukasfink.bsky.social and I uncovered about replication code availability for publications based on the German Socio-Economic Panel #SOEP 📈📉
doi.org/10.1111/ecin...
Replication code availability over time and across fields: Evidence from the German Socio‐Economic Panel
Providing replication code is an inexpensive way to facilitate reproducibility. However, little is known about the extent of replication code provision. Therefore, we examine the availability of repl....
doi.org

Reposted by Jan Marcus, Georg Weizsäcker

gesistraining.bsky.social
GESIS Training @gesistraining.bsky.social · 1d
If Difference-in-Differences has been on your “to-learn” list, now is your chance to dig in. Our #GESISworkshop with @janmarcus.de takes you from DiD basics to advanced topics like triple differences, synthetic control, and modern estimators — all in R and Stata.

➡️ t1p.de/dif_in_dif_26
GESIS Workshop Foundations and Advances in Difference-in-Differences 03 to 04 February 2026 | Online Jan Marcus (Freie Universität Berlin)

janmarcus.de
Jan Marcus @janmarcus.de · 3d
Looking forward to teaching this training course on diff-in-diff.

Registration still possible!
gesistraining.bsky.social GESIS Training @gesistraining.bsky.social · 5d
*Foundations and Advances in Difference-in-Differences* by @janmarcus.de.

🗓️ 03 – 04 February 2026
🏢 Online
🌐 t1p.de/dif_in_dif_26

Reposted by Jan Marcus

gesistraining.bsky.social
GESIS Training @gesistraining.bsky.social · 5d
*Foundations and Advances in Difference-in-Differences* by @janmarcus.de.

🗓️ 03 – 04 February 2026
🏢 Online
🌐 t1p.de/dif_in_dif_26

Reposted by Jan Marcus

fu-berlin-vwl.bsky.social
FU Berlin Economics @fu-berlin-vwl.bsky.social · 6d
🗓️ Thursday, November 6:
We are very happy to have Matthias Doepke at the Research Seminar in Economics at @freieuniversitaet.bsky.social . He will present his work on „Preparing Kids for Capitalism: The Effect of German Reunification“
#EconFUBerlin #RseFUBerlin

Reposted by Jan Marcus

fu-berlin-vwl.bsky.social
FU Berlin Economics @fu-berlin-vwl.bsky.social · 13d
🗓️ Thursday, October 30:
We are very happy to welcome Vasyl Golosnoy at the Research Seminar in Economics at @freieuniversitaet.bsky.social . He will present his work on „Combining portfolio rules to improve prediction of global minimum variance portfolio“
#EconFUBerlin #RseFUBerlin

Reposted by Joanna Bryson, Jan Marcus, Tommaso Frattini

bsoeberlin.bsky.social
Berlin School of Economics @bsoeberlin.bsky.social · 14d
📢 Call for Applications: 2026 PhD Program

Opportunities across four different PhD tracks:

🔹 PhD in Economics
🔹 PhD in Accounting
🔹 PhD in Finance
🔹 PhD in Management

❗ Application Deadline: January 15, 2026

More information👇
berlinschoolofeconomics.de/phd-program/...

#phdcallforapplications

Reposted by Jan Marcus

jrgptrs.bsky.social
Jörg Ankel-Peters @jrgptrs.bsky.social · 16d
Our Leibniz Open Science Day, 'Better Science for Better Policies', is taking place tomorrow in Berlin, with an exciting programme of interesting papers - check them out. The meta-scientific community is really taking off! www.zbw.eu/de/ueber-uns...

janmarcus.de
Jan Marcus @janmarcus.de · 18d
@fu-berlin-vwl.bsky.social @steinhardt.bsky.social @danzernatalia.bsky.social @pncmohr.bsky.social @gehrkeb.bsky.social @anjaprummer.bsky.social @m-santos-silva.bsky.social

janmarcus.de
Jan Marcus @janmarcus.de · 18d
And to our dean, Jochen Bigus, and Peter Mohr, the spokesperson of the economics department!

janmarcus.de
Jan Marcus @janmarcus.de · 18d
Thanks also to @shushmargaryan.bsky.social from Potsdam University for an excellent job as discussant!
Shushanik discussing

Reposted by Peter Haan, Paul Goldsmith-Pinkham

janmarcus.de
Jan Marcus @janmarcus.de · 18d
🎉 Yesterday, we had the pleasure of welcoming our new tenure-track Assistant Professor @philippbach.bsky.social at @freieuniversitaet.bsky.social

In his talk, Philipp gave an inspiring overview of his work in the field of #CausalMachineLearning: method development, software tools, and applications.
Peter Mohr, Philipp Bach, Jochen Bigus, Shushanik Margaryan Philipp presenting the receiption

janmarcus.de
Jan Marcus @janmarcus.de · 20d
You want to see @philippbach.bsky.social and @shushmargaryan.bsky.social in one session?

Come to the welcome event for our new colleague Philipp Bach at @fu-berlin-vwl.bsky.social on Thursday!
fu-berlin-vwl.bsky.social FU Berlin Economics @fu-berlin-vwl.bsky.social · 20d
🗓️ Thursday, October 23:
We are very happy to have Philipp Bach and Shushanik Margaryan at the Reasearch Seminar in Economics. They will present their work on „Causal Machine Learning - New Estimation Approaches for Empirical Economics“ and „An Applied Micro Perspective on Causal Machine Learning“

Reposted by Jan Marcus

fu-berlin-vwl.bsky.social
FU Berlin Economics @fu-berlin-vwl.bsky.social · 20d
🗓️ Thursday, October 23:
We are very happy to have Philipp Bach and Shushanik Margaryan at the Reasearch Seminar in Economics. They will present their work on „Causal Machine Learning - New Estimation Approaches for Empirical Economics“ and „An Applied Micro Perspective on Causal Machine Learning“

janmarcus.de
Jan Marcus @janmarcus.de · 27d
Congratulations, Daniel! Very well deserved!

Reposted by Jan Marcus

fu-berlin-vwl.bsky.social
FU Berlin Economics @fu-berlin-vwl.bsky.social · 27d
The new semester is here, and so is the Research Seminar in Economics! 🎉
Every Thursday, a guest speaker will share their latest research on various topics. We are starting tomorrow with Oleg Nivievskyi; he will talk about his research on „Impact of Tax Incentives on Industry Performance and Growth“

Reposted by Richard S.J. Tol, Dorothy Bishop, Kamran Abbasi , and 11 more

steamtraen.eu
Nick Brown @steamtraen.eu · 29d
Next time an institution tells you how seriously it takes research misconduct, ask them if it's *this* seriously. www.bmj.com/content/297/...
In 1916 the BMJ published an article about the work done by James Shearer, an American physician working in the British Army as a sergeant (because he had no British qualification). He had described a "delineator" which was better than x rays for portraying gunshot wounds. This caused a sensation and a lot of interest — but on investigation the work was found to have been invented. The BMJ published a retraction, but Shearer was tried by court martial and sentenced to death by firing squad.

Reposted by Jan Marcus

lunafazio.bsky.social
Luna Fazio @lunafazio.bsky.social · Oct 1
Took part yesterday in @freieuniversitaet.bsky.social's Replication Games, it was such a nice experience! People were lovely and the work was a very fun challenge.

Thanks to @i4replication.bsky.social and @janmarcus.de for organizing this, it was absolutely worth enduring the ride from Dortmund. 😄

Reposted by Jan Marcus

annagoeddeke.bsky.social
Anna Goeddeke @annagoeddeke.bsky.social · Sep 22
Vielleicht für einige deutschsprachige Ökonomen hier interessant. Am Donnerstag um 14 Uhr erzählen @christiantode1.bsky.social und ich was zu unseren Erfahrungen mit den @coreecon.bsky.social The Economy Büchern in Mikro/Makro Vorlesungen. Der Veranstaltung ist online!
#TeachEcon
Community für wissenschaftliches Arbeiten in den Wirtschaftswissenschaften
Wir bieten Dozent:innen und Expert:innen für Informationskompetenz und wissenschaftliches Arbeiten in den Wirtschaftswissenschaften eine Plattform für Vernetzung und den Austausch von Wissen.
www.zbw.eu

janmarcus.de
Jan Marcus @janmarcus.de · Sep 16
Great to see such a strong presence of @fu-berlin-vwl.bsky.social at the @vfsecon.bsky.social's Annual Conference in Cologne – always an inspiring venue for research and exchange!

@danzernatalia.bsky.social @piotrlarysz.bsky.social @philippbach.bsky.social @phaan.bsky.social @simonvoss.bsky.social
Economist of the Free University Berlin at the Annual Meeting of the Verein für Socialpolitik

Reposted by Jan Marcus, Georg Weizsäcker

chtraxler.bsky.social
Christian Traxler @chtraxler.bsky.social · Sep 11
We're looking forward to hosting the opening of @bsoeberlin.bsky.social' acadmic year @hertieschool.bsky.social on October 8. To join us at this event, which includes (among others) a keynote by Michèle Tertilt on 'The Economics of Women’s Rights', register via👇
www.hertie-school.org/en/events/ev...

Reposted by Jörg Peters

janmarcus.de
Jan Marcus @janmarcus.de · Sep 10
🚨 Last chance to join the Berlin Replication Games! Registration closes this Friday, September 12.

janmarcus.de
Jan Marcus @janmarcus.de · Aug 21
Congratulations, Johannes!

Reposted by Nico Pestel, Jan Marcus

ingoisphording.bsky.social
Ingo E. Isphording @ingoisphording.bsky.social · Aug 20
I am super happy about the IZA network and DP series having found a new home at @liser.lu . Having visited in the past, I think LISER is the kind of place IZA could (and should ) have been. I wish them all the best!

Reposted by Jan Marcus

georgweizsaecker.bsky.social
Georg Weizsäcker @georgweizsaecker.bsky.social · Aug 20
An interesting moment in German politics. A former minister is indicted for false testimony at at an investigative committee in parlament. He cries WHICH HUNT, i.e., that the indictment is politically motivated.

It will be important how many of his political allies play along with him.

Reposted by Ben H. Ansell, Nicholas A. Christakis, Joshua Goodman , and 4 more

jenniferdoleac.bsky.social
Jennifer Doleac @jenniferdoleac.bsky.social · Aug 15
It's been 2 years (+ 1 month) since I left academia. In case anyone is wondering, I have zero regrets. Indeed, I'm living my best life and am so happy I made the leap.

If you're considering leaving too, here are some thoughts on how to explore your options/find a job you'll love...

Reposted by Colin Green, Jan Marcus

cyganrehm.bsky.social
Kamila Cygan-Rehm @cyganrehm.bsky.social · Aug 15
One-year visiting position for advanced female postdocs in Dresden. I am happy to host anyone broadly interested in applied micro. Salary within the German public sector's pay scale (TV-L, E13-E15). Deadline: Sept 15, 2025. Please share widely! 👇

Reposted by Jan Marcus

gzamarro.bsky.social
Gema Zamarro @gzamarro.bsky.social · Aug 14
Photo taken at my kid’s robotics class. Same message I tell students when they start coding in their doctorate program 😊

Reposted by Ingo Rohlfing, Jan Marcus, Johannes Breuer

ianhussey.mmmdata.io
Ian Hussey @ianhussey.mmmdata.io · Aug 13
9.2% of all citations go to just 0.32% of psychology articles.

To have the most impact, post-publication peer-review should focus on these influential articles with ≥30 citations per year.

@error.reviews will systemically sample from such articles.

Blog post:
mmmdata.io/posts/2025/0...

Reposted by Jan Marcus

andydebarros.bsky.social
Andy de Barros @andydebarros.bsky.social · Aug 10
TIL "Originally considered by Allied scientists in World War II, [multi-armed bandits] proved so intractable that (...) the problem was proposed to be dropped over Germany so that German scientists could also waste their time on it."

doi.org/10.1111/j.25...

en.wikipedia.org/wiki/Multi-a...

Reposted by Jan Marcus

asanchez-tojar.bsky.social
Alfredo Sánchez-Tójar @asanchez-tojar.bsky.social · Aug 4
Check out our latest preprint 📣 TADA guidelines 📣

TADA (Transferable, Accessible, Documented, Annotated) helps researchers across disciplines share code, with the ultimate goal of increasing code availability & its quality.

Brilliantly led by @eivimeycook.bsky.social

🔗 doi.org/10.32942/X2D...