Very happy that my meta-analysis with Nik Stoop, Peter van der Windt and Haoyu Zhai has been published @bjpols.bsky.social ! We re-analyze *118* survey experimental studies on attitudes towards migrants in 53 countries. Huge thanks to all authors for sharing data files. doi.org/10.1017/S000...

We are hiring a PhD student to join us at the @hertiesecurity.bsky.social (start Sept. 2026)! If you want to conduct research on topics related to digital authoritarianism, state repression, contentious politics or social movements online, then this job might be for you!

Every summer, parades in Northern Ireland bring tension. In our new study, we combine data on 55,000+ parades, surveys, & fieldwork to show how “contentious rituals” affect intergroup relations. All thanks to my amazing co-authors: Kit Rickard, Giovanni Hollenweger & @kristinmbakke.bsky.social

This summer, Professor Ruth Ditlmann led the "Randomized Intergroup Interventions" workshop at the Hertie School, funded by Volkswagen Stiftung. They explored how intergroup conflicts, prejudice, and social divisions influence political outcomes and policy preferences.

Great summary of our study with @arolsenarchives.bsky.social and its message: “For ordinary citizens, the takeaway is clear: Don’t just read about history—help preserve it. Your contribution creates ripples […] potentially helping to build stronger, more inclusive societies.” shorturl.at/Urozd

🧠 Can learning about historical atrocities really change minds? Join Ruth Ditlmann to explore how past violence impacts identity, recognition & intergroup relations today. 📅 22 May 2025 📍 Room 6.207, Alexanderstr. 3 🔗 www.hertie-school.org/en/events/ev... #HistoricalMemory #HertieSchool

Interview im Deutschlandfunk zu unser neuen Studie zur Wirkung partizipativer Erinnerungsprojekte (publiziert mit Ruth Ditlmann und @oguzhanturkoglu.bsky.social): www.deutschlandfunk.de/aktives-erin...

Berlin folks: Join us tonight for the launch of our new paper and a discussion of its implications for political education and memory projects. English interpretation will be available. www.hertie-school.org/en/events/ev...

EGAP policy brief about our PNAS paper on local memorials and far-right voting: egap.org/resource/how...

@ Polisky

How is digital technology used in conflict situations? Why should we not give up hope on digital technology? We talked to Professor and cyber security expert Anita Gohdes @argohdes.bsky.social about her recently published book "Repression in the Digital Age". bit.ly/46Zbeub

We're hiring an assistant prof in macroeconomics @ Hertie in Berlin, together with the IfW Kiel 👉 apply.interfolio.com/133002

If you are interested in joining our community at the Center for International Security @ the Hertie School, consider applying to our fellowship(s)! www.hertie-school.org/en/internati...