Political Scientist: studying democracy with experiments & data
Professor | University of Münster
Associate Professor | Aarhus University
(he/him | "Sie" als Anrede brauche ich nicht)
@epssnet.bsky.social #epss2026:
There is no limit of being co-author only on two papers. No need to start strategically deleting names...
epssnet.org/belfast-2026...
@epssnet.bsky.social #epss2026:
There is no limit of being co-author only on two papers. No need to start strategically deleting names...
epssnet.org/belfast-2026...
"How Citizens Perceive Others: The Role of Social Norms for Democracies"
I'll be around until Friday and back a few times before Christmas; happy to meet up if you're around and want to chat!☕
@ciseth.bsky.social @ipz.bsky.social
"How Citizens Perceive Others: The Role of Social Norms for Democracies"
I'll be around until Friday and back a few times before Christmas; happy to meet up if you're around and want to chat!☕
@ciseth.bsky.social @ipz.bsky.social
Trotz Auflösung wurde weiter wild spekuliert (darum gelöscht von mir): Die Journalistin hat *nichts* blind von einer KI übernommen... 🧵
Trotz Auflösung wurde weiter wild spekuliert (darum gelöscht von mir): Die Journalistin hat *nichts* blind von einer KI übernommen... 🧵
Das Problem bleibt; Quelle blind vertraut.
Das Problem bleibt; Quelle blind vertraut.
Das sollen die bitte lernen!
Das sollen die bitte lernen!
Wann hört ihr den Knall endlich?
Wann hört ihr den Knall endlich?
Love the appendix though, super interesting to see what the groups ate.
www.nature.com/articles/s41...
Love the appendix though, super interesting to see what the groups ate.
www.nature.com/articles/s41...
Inspired by how the government defines it and including 17 sustainability goals, for more see for instance here:
www.bundesregierung.de/breg-de/schw...
Inspired by how the government defines it and including 17 sustainability goals, for more see for instance here:
www.bundesregierung.de/breg-de/schw...
Wait a minute...Berlin...nowhere to be found?!? No Berghain? No Spree? Ufta...
Wait a minute...Berlin...nowhere to be found?!? No Berghain? No Spree? Ufta...
Counties with more bans =
⬆️ More protests
⬆️ More support for the Greens
⬆️ Long-term shift in political alignment
Democratic repression didn't kill dissent. It helped organize it.
Counties with more bans =
⬆️ More protests
⬆️ More support for the Greens
⬆️ Long-term shift in political alignment
Democratic repression didn't kill dissent. It helped organize it.
✅ 1,095 individuals banned
✅ Local protest data
✅ Voting data over decades
✅ Survey evidence
Across multiple sources and levels of analysis, one pattern stands out: backlash.
✅ 1,095 individuals banned
✅ Local protest data
✅ Voting data over decades
✅ Survey evidence
Across multiple sources and levels of analysis, one pattern stands out: backlash.
The goal: keep suspected left-wing extremists out of public jobs — especially teachers.
Result? Over 1,000 people were banned. Millions were screened.
But that's not the full story...
The goal: keep suspected left-wing extremists out of public jobs — especially teachers.
Result? Over 1,000 people were banned. Millions were screened.
But that's not the full story...
Our (w. @valentimvicente.bsky.social) paper finds: punishing individuals might backfire. We study a West German policy banning "extreme left" individuals from working for the state.
#Democracy #PoliticalScience
🧵
url: osf.io/usqdb_v2
Our (w. @valentimvicente.bsky.social) paper finds: punishing individuals might backfire. We study a West German policy banning "extreme left" individuals from working for the state.
#Democracy #PoliticalScience
🧵
url: osf.io/usqdb_v2
We think protest acts as a cue that mobilizes latent supporters.
It reminds them the fight for the cause is ongoing and active.
This makes support feel more urgent, visible, and worthwhile.
We think protest acts as a cue that mobilizes latent supporters.
It reminds them the fight for the cause is ongoing and active.
This makes support feel more urgent, visible, and worthwhile.
Those who saw the protest were significantly more likely to donate money to environmental causes.
📬 There is no effect on newsletter subscription.
TL;DR: Protest might move wallets, seldomly minds.
Those who saw the protest were significantly more likely to donate money to environmental causes.
📬 There is no effect on newsletter subscription.
TL;DR: Protest might move wallets, seldomly minds.
- 🗳 Voting intentions? Nope.
- 🌱 Environmental attitudes? Mostly unchanged.
- 👥 Perceived social norms? Little immediate change.
But…
- 🗳 Voting intentions? Nope.
- 🌱 Environmental attitudes? Mostly unchanged.
- 👥 Perceived social norms? Little immediate change.
But…
We randomly assigned people walking through Berlin to either pass an FFF protest (treatment) or not (control).
Everyone filled out a pre- and post-survey. Participants were offered a chance to donate part of their compensation to climate causes and sign up for newsletters.
We randomly assigned people walking through Berlin to either pass an FFF protest (treatment) or not (control).
Everyone filled out a pre- and post-survey. Participants were offered a chance to donate part of their compensation to climate causes and sign up for newsletters.
osf.io/preprints/os...
Can protests move bystanders, people who observe protests without being part of the march?
We conducted a 3-wave field experiment during real Fridays for Future (FFF) protests in Berlin.
Here's what we found 🧵👇
osf.io/preprints/os...
Can protests move bystanders, people who observe protests without being part of the march?
We conducted a 3-wave field experiment during real Fridays for Future (FFF) protests in Berlin.
Here's what we found 🧵👇
Mit Mitte 50 dann eine Klage einreichen, um all diese Entscheidungen zu rächen. Wer macht sowas? Klagen weil man nicht im Sportteam mitspielen darf? Was für Opfer.
Mit Mitte 50 dann eine Klage einreichen, um all diese Entscheidungen zu rächen. Wer macht sowas? Klagen weil man nicht im Sportteam mitspielen darf? Was für Opfer.
Cool down: danach wird’s auch wieder besser!
Cool down: danach wird’s auch wieder besser!
Aber sei's drum.
Aber sei's drum.