Joris Frese
@fresejoris.bsky.social
PhD candidate in political science at the EUI [On the 25/26 job market].
Currently visiting Harvard's Department of Government.
Interested in: political behavior, quantitative methods, metascience.
https://www.jorisfrese.com/
Currently visiting Harvard's Department of Government.
Interested in: political behavior, quantitative methods, metascience.
https://www.jorisfrese.com/
Pinned
Joris Frese
@fresejoris.bsky.social
· May 21
🇪🇺🇦🇫 Published Today in CPS 🇪🇺🇦🇫
“Stand by those who share our values” – how refugees fleeing the Taliban improved European attitudes toward immigration
Article: journals.sagepub.com/doi/10.1177/...
Pre-print: osf.io/preprints/os...
Thread: 1/8
“Stand by those who share our values” – how refugees fleeing the Taliban improved European attitudes toward immigration
Article: journals.sagepub.com/doi/10.1177/...
Pre-print: osf.io/preprints/os...
Thread: 1/8
Reposted by Joris Frese
🇪🇺🇩🇪 Published Today in @bjpols.bsky.social 🇮🇹🇫🇷
How a voting advice application affected voting behavior in three large-scale field experiments:
shorturl.at/2ekBj
TLDR of our study (with @simonhix.bsky.social & @rlachat.bsky.social) below 👇 1/14
How a voting advice application affected voting behavior in three large-scale field experiments:
shorturl.at/2ekBj
TLDR of our study (with @simonhix.bsky.social & @rlachat.bsky.social) below 👇 1/14
December 18, 2025 at 11:41 AM
🇪🇺🇩🇪 Published Today in @bjpols.bsky.social 🇮🇹🇫🇷
How a voting advice application affected voting behavior in three large-scale field experiments:
shorturl.at/2ekBj
TLDR of our study (with @simonhix.bsky.social & @rlachat.bsky.social) below 👇 1/14
How a voting advice application affected voting behavior in three large-scale field experiments:
shorturl.at/2ekBj
TLDR of our study (with @simonhix.bsky.social & @rlachat.bsky.social) below 👇 1/14
🇪🇺🇩🇪 Published Today in @bjpols.bsky.social 🇮🇹🇫🇷
How a voting advice application affected voting behavior in three large-scale field experiments:
shorturl.at/2ekBj
TLDR of our study (with @simonhix.bsky.social & @rlachat.bsky.social) below 👇 1/14
How a voting advice application affected voting behavior in three large-scale field experiments:
shorturl.at/2ekBj
TLDR of our study (with @simonhix.bsky.social & @rlachat.bsky.social) below 👇 1/14
December 18, 2025 at 11:41 AM
🇪🇺🇩🇪 Published Today in @bjpols.bsky.social 🇮🇹🇫🇷
How a voting advice application affected voting behavior in three large-scale field experiments:
shorturl.at/2ekBj
TLDR of our study (with @simonhix.bsky.social & @rlachat.bsky.social) below 👇 1/14
How a voting advice application affected voting behavior in three large-scale field experiments:
shorturl.at/2ekBj
TLDR of our study (with @simonhix.bsky.social & @rlachat.bsky.social) below 👇 1/14
Reposted by Joris Frese
It has been a while since @flavioazevedo.bsky.social asked me to take over the Reversals project at @forrt.bsky.social...
It has since evolved beyond my wildest dreams, mostly thanks to @aufdroeseler.bsky.social & @lukaswallrich.bsky.social.
We are very proud of the Replication Hub & Database ♥️
It has since evolved beyond my wildest dreams, mostly thanks to @aufdroeseler.bsky.social & @lukaswallrich.bsky.social.
We are very proud of the Replication Hub & Database ♥️
December 3, 2025 at 6:06 PM
It has been a while since @flavioazevedo.bsky.social asked me to take over the Reversals project at @forrt.bsky.social...
It has since evolved beyond my wildest dreams, mostly thanks to @aufdroeseler.bsky.social & @lukaswallrich.bsky.social.
We are very proud of the Replication Hub & Database ♥️
It has since evolved beyond my wildest dreams, mostly thanks to @aufdroeseler.bsky.social & @lukaswallrich.bsky.social.
We are very proud of the Replication Hub & Database ♥️
Reposted by Joris Frese
🚨NEW WORKING PAPER🚨 Why are many Latino immigrants *not* naturalizing, learning English, and participating in American politics? We provide new theory and evidence across 3 surveys and an instrumental variables approach to show how migration motives shape immigrant integration. tinyurl.com/3expvu8e
December 12, 2025 at 9:11 PM
🚨NEW WORKING PAPER🚨 Why are many Latino immigrants *not* naturalizing, learning English, and participating in American politics? We provide new theory and evidence across 3 surveys and an instrumental variables approach to show how migration motives shape immigrant integration. tinyurl.com/3expvu8e
Reposted by Joris Frese
After 3 years and 5,322 emails (and counting) our Encyclopedia of Political Communication is finally out at @elgarpublishing.bsky.social
📚 Three volumes
⭐ 431 entries
🎓 581 wonderful authors from across the world
A very short 🧵
📚 Three volumes
⭐ 431 entries
🎓 581 wonderful authors from across the world
A very short 🧵
December 10, 2025 at 4:05 PM
After 3 years and 5,322 emails (and counting) our Encyclopedia of Political Communication is finally out at @elgarpublishing.bsky.social
📚 Three volumes
⭐ 431 entries
🎓 581 wonderful authors from across the world
A very short 🧵
📚 Three volumes
⭐ 431 entries
🎓 581 wonderful authors from across the world
A very short 🧵
The core thesis of our Brextinction paper, beautifully (or morbidly?) summarized in one flowchart (also based on YouGov data).
@simonhix.bsky.social @juhoharkonen.bsky.social
ejpr.onlinelibrary.wiley.com/doi/10.1111/...
@simonhix.bsky.social @juhoharkonen.bsky.social
ejpr.onlinelibrary.wiley.com/doi/10.1111/...
Absolutely amazing chart from @peterkellner.bsky.social's piece in @thenewworldmag.bsky.social today:
www.thenewworld.co.uk/peter-kellne...
www.thenewworld.co.uk/peter-kellne...
December 10, 2025 at 1:45 PM
The core thesis of our Brextinction paper, beautifully (or morbidly?) summarized in one flowchart (also based on YouGov data).
@simonhix.bsky.social @juhoharkonen.bsky.social
ejpr.onlinelibrary.wiley.com/doi/10.1111/...
@simonhix.bsky.social @juhoharkonen.bsky.social
ejpr.onlinelibrary.wiley.com/doi/10.1111/...
A well-deserved recognition and an example of how simple the improvement of science can be at times: one small policy change will disincentivize fraud and plagiarism at scale in the country with the 3rd-highest number of retractions in the world (depends of course on the quality of implementation).
Achal Agrawal is on Nature’s list of 10 people who shaped science in 2025. His work helped change India’s university rankings system to include a penalty for large number of retractions.
www.nature.com/articles/d41...
www.nature.com/articles/d41...
This science sleuth revealed a retraction crisis at Indian universities
Achal Agrawal is part of Nature’s 10, a list of people who shaped science in 2025.
www.nature.com
December 9, 2025 at 8:11 PM
A well-deserved recognition and an example of how simple the improvement of science can be at times: one small policy change will disincentivize fraud and plagiarism at scale in the country with the 3rd-highest number of retractions in the world (depends of course on the quality of implementation).
Reposted by Joris Frese
This is a UESD just waiting to happen (get on it @fresejoris.bsky.social!)
www.theguardian.com/australia-ne...
www.theguardian.com/australia-ne...
Australia’s world-first social media ban begins as millions of children and teens lose access to accounts
Accounts held by users under 16 must be removed on apps that include TikTok, Facebook, Instagram, X, YouTube, Snapchat, Reddit, Kick, Twitch and Threads under ban
www.theguardian.com
December 9, 2025 at 5:03 PM
This is a UESD just waiting to happen (get on it @fresejoris.bsky.social!)
www.theguardian.com/australia-ne...
www.theguardian.com/australia-ne...
Reposted by Joris Frese
New paper in @ajpseditor.bsky.social. Is descriptive representation good for substantive representation? Why do voters stay loyal to corrupt and poorly governing ethnic parties? I argue that we ought to focus less on patronage and more on dignity concerns. Defiant pride can come at a price. 1/🧵
December 8, 2025 at 10:01 PM
New paper in @ajpseditor.bsky.social. Is descriptive representation good for substantive representation? Why do voters stay loyal to corrupt and poorly governing ethnic parties? I argue that we ought to focus less on patronage and more on dignity concerns. Defiant pride can come at a price. 1/🧵
Reposted by Joris Frese
Happy Thanksgiving everyone!
November 27, 2025 at 6:25 AM
Happy Thanksgiving everyone!
As someone studying unexpected events of all kinds, this was a funny (and unexpected) paper to randomly stumble upon: the presence of a man in a batman costume on a train makes passengers significantly more likely to stand up for a pregnant woman: www.nature.com/articles/s44... Good to know I guess.
November 22, 2025 at 7:38 PM
As someone studying unexpected events of all kinds, this was a funny (and unexpected) paper to randomly stumble upon: the presence of a man in a batman costume on a train makes passengers significantly more likely to stand up for a pregnant woman: www.nature.com/articles/s44... Good to know I guess.
Reposted by Joris Frese
📢 CALL FOR PAPERS!
We’re looking for presenters for the upcoming term (early January to mid-June 2026).
If you’d like to present, please fill out the form here: forms.gle/wdq27WcDLC7i...
🗓 Deadline for proposals: December 15
We’re looking for presenters for the upcoming term (early January to mid-June 2026).
If you’d like to present, please fill out the form here: forms.gle/wdq27WcDLC7i...
🗓 Deadline for proposals: December 15
EUI Political Behaviour Colloquium
Please fill in the details below to submit your proposal.
Kindly provide the title and abstract of your paper, as well as your availability to present. The Colloquium is held every Tuesday from 17:00 ...
forms.gle
November 17, 2025 at 8:48 AM
📢 CALL FOR PAPERS!
We’re looking for presenters for the upcoming term (early January to mid-June 2026).
If you’d like to present, please fill out the form here: forms.gle/wdq27WcDLC7i...
🗓 Deadline for proposals: December 15
We’re looking for presenters for the upcoming term (early January to mid-June 2026).
If you’d like to present, please fill out the form here: forms.gle/wdq27WcDLC7i...
🗓 Deadline for proposals: December 15
A question I have also contemplated at times: would quantitative researchers make good quantitative traders? Some answers in Lauren's great blog 👇
I did that thing where I say, “I’m just going to explore this quickly,” and suddenly - as a complete non-expert - I’ve built a simple stock-trading algorithm.
I wrote up the whole experience and what I learned (and I promise the explanations are very lightweight):
open.substack.com/pub/laurenle...
I wrote up the whole experience and what I learned (and I promise the explanations are very lightweight):
open.substack.com/pub/laurenle...
How Hard Can Quant Trading Really Be? I Tried It to Find Out.
Hedge funds have armies of PhDs, Bloomberg terminals, and million-dollar data feeds. I have Python open in VS Code - and a PhD in political economy. How much can I reproduce on my laptop?
open.substack.com
November 13, 2025 at 2:53 PM
A question I have also contemplated at times: would quantitative researchers make good quantitative traders? Some answers in Lauren's great blog 👇
Reposted by Joris Frese
Nano-targeting or mass appeal, what makes persuasive climate communications?
@miriamsorace.bsky.social @lsedatascience.bsky.social, Thomas Robinson @lsemethodology.bsky.social, @simonhix.bsky.social @epssnet.bsky.social and @fresejoris.bsky.social @eui-eu.bsky.social for @lseimpactblog.bsky.social
@miriamsorace.bsky.social @lsedatascience.bsky.social, Thomas Robinson @lsemethodology.bsky.social, @simonhix.bsky.social @epssnet.bsky.social and @fresejoris.bsky.social @eui-eu.bsky.social for @lseimpactblog.bsky.social
Nano-targeting or mass appeal, what makes persuasive climate communications? - Impact of Social Sciences
Are nano-targeting tools capable of creating more persuasive climate communications, or broad appeal messages still the best way to move audiences on climate?
blogs.lse.ac.uk
November 12, 2025 at 11:41 AM
Nano-targeting or mass appeal, what makes persuasive climate communications?
@miriamsorace.bsky.social @lsedatascience.bsky.social, Thomas Robinson @lsemethodology.bsky.social, @simonhix.bsky.social @epssnet.bsky.social and @fresejoris.bsky.social @eui-eu.bsky.social for @lseimpactblog.bsky.social
@miriamsorace.bsky.social @lsedatascience.bsky.social, Thomas Robinson @lsemethodology.bsky.social, @simonhix.bsky.social @epssnet.bsky.social and @fresejoris.bsky.social @eui-eu.bsky.social for @lseimpactblog.bsky.social
Reposted by Joris Frese
💥New: Nano-targeting or mass appeal, what makes persuasive climate communications?
✍️ @miriamsorace.bsky.social,Thomas Robinson, @simonhix.bsky.social & @fresejoris.bsky.social
#COP30 #ClimateComms #NanoTargeting
✍️ @miriamsorace.bsky.social,Thomas Robinson, @simonhix.bsky.social & @fresejoris.bsky.social
#COP30 #ClimateComms #NanoTargeting
Nano-targeting or mass appeal, what makes persuasive climate communications? - Impact of Social Sciences
Are nano-targeting tools capable of creating more persuasive climate communications, or broad appeal messages still the best way to move audiences on climate?
blogs.lse.ac.uk
November 10, 2025 at 10:59 AM
💥New: Nano-targeting or mass appeal, what makes persuasive climate communications?
✍️ @miriamsorace.bsky.social,Thomas Robinson, @simonhix.bsky.social & @fresejoris.bsky.social
#COP30 #ClimateComms #NanoTargeting
✍️ @miriamsorace.bsky.social,Thomas Robinson, @simonhix.bsky.social & @fresejoris.bsky.social
#COP30 #ClimateComms #NanoTargeting
Reposted by Joris Frese
📄 New WP version out - full overhaul!
The Politics of Evidence Selection (w/ @jesperasring.bsky.social )
Comments welcome!
🔗 osf.io/preprints/so...
The Politics of Evidence Selection (w/ @jesperasring.bsky.social )
Comments welcome!
🔗 osf.io/preprints/so...
November 6, 2025 at 3:30 PM
📄 New WP version out - full overhaul!
The Politics of Evidence Selection (w/ @jesperasring.bsky.social )
Comments welcome!
🔗 osf.io/preprints/so...
The Politics of Evidence Selection (w/ @jesperasring.bsky.social )
Comments welcome!
🔗 osf.io/preprints/so...
Delighted to be visiting Harvard's Department of Government as a Fellow. Loving the free food at most seminars here (EUI take note)! I have an office at the CGIS during the Fall and Spring Semester, so if you are around and would like to talk about research or play a game of chess, let me know 🙂
November 7, 2025 at 1:10 PM
Delighted to be visiting Harvard's Department of Government as a Fellow. Loving the free food at most seminars here (EUI take note)! I have an office at the CGIS during the Fall and Spring Semester, so if you are around and would like to talk about research or play a game of chess, let me know 🙂
Reposted by Joris Frese
"While high-quality content is posted more and receives more total engagement across platforms...a given author attracts higher levels of engagement when they post lower-quality content"
"pattern we find seems to be driven more by an underperformance of particularly popular high-quality outlets"
"pattern we find seems to be driven more by an underperformance of particularly popular high-quality outlets"
Divergent patterns of engagement with partisan and low-quality news across seven social media platforms | PNAS
In recent years, social media has become increasingly fragmented, as platforms evolve
and new alternatives emerge. Yet most research studies a sing...
www.pnas.org
November 5, 2025 at 3:47 PM
"While high-quality content is posted more and receives more total engagement across platforms...a given author attracts higher levels of engagement when they post lower-quality content"
"pattern we find seems to be driven more by an underperformance of particularly popular high-quality outlets"
"pattern we find seems to be driven more by an underperformance of particularly popular high-quality outlets"
Reposted by Joris Frese
New paper with @mhamjediers.bsky.social
German judges have discretion to apply rehabilitative juvenile criminal law (Jugendstrafrecht) or punitive adult criminal law to 18–20-year-old offenders. We show that immigrant youths are ~10 percentage points less likely to be sentenced under juvenile law
German judges have discretion to apply rehabilitative juvenile criminal law (Jugendstrafrecht) or punitive adult criminal law to 18–20-year-old offenders. We show that immigrant youths are ~10 percentage points less likely to be sentenced under juvenile law
NEW -
Anti-Immigrant Bias in the Choice Between Punitive and Rehabilitative Justice - https://cup.org/49vUfVa
- @riazsascha.bsky.social & @mhamjediers.bsky.social
#OpenAccess
Anti-Immigrant Bias in the Choice Between Punitive and Rehabilitative Justice - https://cup.org/49vUfVa
- @riazsascha.bsky.social & @mhamjediers.bsky.social
#OpenAccess
November 4, 2025 at 11:20 AM
New paper with @mhamjediers.bsky.social
German judges have discretion to apply rehabilitative juvenile criminal law (Jugendstrafrecht) or punitive adult criminal law to 18–20-year-old offenders. We show that immigrant youths are ~10 percentage points less likely to be sentenced under juvenile law
German judges have discretion to apply rehabilitative juvenile criminal law (Jugendstrafrecht) or punitive adult criminal law to 18–20-year-old offenders. We show that immigrant youths are ~10 percentage points less likely to be sentenced under juvenile law
Reposted by Joris Frese
Cool new working paper on why and how cable news threw gasoline on the culture war fire. The culture war isn't optimal for electoral candidates, but it's optimal for cable news companies.
ungated: www.dropbox.com/scl/fi/27v4x...
ungated: www.dropbox.com/scl/fi/27v4x...
November 3, 2025 at 7:45 PM
Cool new working paper on why and how cable news threw gasoline on the culture war fire. The culture war isn't optimal for electoral candidates, but it's optimal for cable news companies.
ungated: www.dropbox.com/scl/fi/27v4x...
ungated: www.dropbox.com/scl/fi/27v4x...
Reposted by Joris Frese
The analysis you've been waiting for: "Do you remember who was actually president when that happened?" Turns out the answer is often...no.
1 in 3 forgot Trump was in office on Jan. 6.
HALF didn't say Biden was President during the Afghanistan withdrawal!
yougovamerica.substack.com/p/how-many-a...
1 in 3 forgot Trump was in office on Jan. 6.
HALF didn't say Biden was President during the Afghanistan withdrawal!
yougovamerica.substack.com/p/how-many-a...
October 31, 2025 at 7:27 PM
The analysis you've been waiting for: "Do you remember who was actually president when that happened?" Turns out the answer is often...no.
1 in 3 forgot Trump was in office on Jan. 6.
HALF didn't say Biden was President during the Afghanistan withdrawal!
yougovamerica.substack.com/p/how-many-a...
1 in 3 forgot Trump was in office on Jan. 6.
HALF didn't say Biden was President during the Afghanistan withdrawal!
yougovamerica.substack.com/p/how-many-a...
Reposted by Joris Frese
We have just advertised a Full Prof position in the Political and Social Sciences department at the EUI (@eui-sps.bsky.social). Here are the details. Please spread the word, and get in touch if you have any questions.
www.eui.eu/Documents/Se...
www.eui.eu/Documents/Se...
www.eui.eu
October 23, 2025 at 2:03 PM
We have just advertised a Full Prof position in the Political and Social Sciences department at the EUI (@eui-sps.bsky.social). Here are the details. Please spread the word, and get in touch if you have any questions.
www.eui.eu/Documents/Se...
www.eui.eu/Documents/Se...
Reposted by Joris Frese
Check out Miriam's great thread on our new nano-targeting paper below. One of the most innovative projects I ever had the privilege of contributing to!
October 16, 2025 at 8:08 AM
Check out Miriam's great thread on our new nano-targeting paper below. One of the most innovative projects I ever had the privilege of contributing to!
Reposted by Joris Frese
I had the pleasure of reading this draft paper at a recent workshop, and it's a great contribution. Do check it out 👇
Nano-targeting is not a persuasive weapon: it is a dissuasion and polarization weapon. New paper out osf.io/preprints/so... with the brilliant Thomas Robinson, @simonhix.bsky.social and @fresejoris.bsky.social – the first to quantify the perverse incentives/inherent democratic dangers of this tech.
OSF
osf.io
October 16, 2025 at 8:28 AM
I had the pleasure of reading this draft paper at a recent workshop, and it's a great contribution. Do check it out 👇
Check out Miriam's great thread on our new nano-targeting paper below. One of the most innovative projects I ever had the privilege of contributing to!
October 16, 2025 at 8:08 AM
Check out Miriam's great thread on our new nano-targeting paper below. One of the most innovative projects I ever had the privilege of contributing to!