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Mathias Poertner

@mathiaspoertner.bsky.social
2K followers 637 following 130 posts

Associate Professor @LSEGovernment | Studying representation, politics of identity, parties, development | #FirstGen | he/him | www.mathiaspoertner.com

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Mathias Poertner @mathiaspoertner.bsky.social · 01/10/2026
Excited to welcome @viroliveros.bsky.social at the inaugural LSE Comparative Politics seminar series today *12:00 - 1:30 pm UK time* (in-person and online). She will present “The Policy Basis of Affective Polarization in Weak Party Systems” (with @noamlupu.bsky.social and Luis Schiumerini)
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Mathias Poertner @mathiaspoertner.bsky.social · 01/10/2026
Looking forward to the launch of our brand-new LSE Comparative Politics seminar series today! www.lse.ac.uk/government/r... @lsegovernment.bsky.social @pavisuri.bsky.social @carlmc.bsky.social @gofosu.bsky.social @joekendall.bsky.social
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Mathias Poertner @mathiaspoertner.bsky.social · 20/05/2026
Excited to welcome @nataliasbueno.bsky.social at the LSE Latin American Politics Seminar series today *12:00 - 1:30 pm UK time* (in-person and online). She will present “Coordination Advantage: How Partisan Favoritism Persists Under Accountability Institutions” @lsegovernment.bsky.social
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Konstantin Bogatyrev @bogatyrev.bsky.social · 07/05/2026
Today at 4pm London: @adamberinsky.bsky.social (MIT) presents his work on Labelling AI-Generated Media Content at the @lsegovernment.bsky.social Political Behaviour Seminar (hybrid), co-organised with @sarahobolt.bsky.social, @florianfoos.bsky.social and @mathiaspoertner.bsky.social. Join us!
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Konstantin Bogatyrev @bogatyrev.bsky.social · 02/04/2026
Today at 4pm BST: @simonhix.bsky.social (EUI) presents his new work on the Méline Tariff and the Rise of Socialism in 🇫🇷 at the @lsegovernment.bsky.social Political Behaviour Seminar (hybrid), co-organised with @sarahobolt.bsky.social, @florianfoos.bsky.social & @mathiaspoertner.bsky.social. Join us!
Political Consequences of Trade Protection: The Méline Tariff and the Rise of Socialism in France

Simon Hix and Alejandro Lopéz Peceño
From classical economics, we know that tariffs harm consumers by raising the prices of imported goods and their domestic substitutes, while protecting producers

in import-competing sectors. But how do these distributional consequences shape electoral politics? We argue that tariffs can cause political re-alignments by enabling challenger parties to mobilize around distributional conflicts and activate latent cleavages. We test this in the case of the Méline tariff, France’s landmark protectionist reform of 1892. We measure the political effect of the tariff by combining product-level tariff changes, census data on sectoral employment composition, and election results. We find that socialist candidates – the political challengers at the time – gained more votes in places that were most negatively affected by the tariff, at the expense of the incumbent republicans. These results highlight the conditions under which tariffs can reshape existing political conflicts, and points to the importance of trade.
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Konstantin Bogatyrev @bogatyrev.bsky.social · 19/03/2026
Today at 4pm GMT: Anna Clemente (@lsegovernment.bsky.social) is presenting “World War II Memories and Authoritarian Attitudes in Germany” at the Political Behaviour Seminar, organised with @sarahobolt.bsky.social, @florianfoos.bsky.social, & @mathiaspoertner.bsky.social. Join us in London & online!
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Konstantin Bogatyrev @bogatyrev.bsky.social · 12/03/2026
Today at 4pm GMT: @gaetanoinglese.bsky.social is presenting “The Political Consequences of AI‑driven Employment Threats” at the @lsegovernment.bsky.social Political Behaviour Seminar (hybrid), organised with @sarahobolt.bsky.social, @florianfoos.bsky.social & @mathiaspoertner.bsky.social. Join us!
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Mathias Poertner @mathiaspoertner.bsky.social · 05/03/2026
Excited to welcome @jorgemang for a joint session of the LSE Latin American Politics Seminar and Political Behaviour series today *12:00 - 1:30 pm UK time* (in-person and online). He will present “The Insurgent Roots of Indigenous Rights Litigation” @lsegovernment.bsky.social
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Konstantin Bogatyrev @bogatyrev.bsky.social · 19/02/2026
The @lsegovernment.bsky.social Political Behaviour Seminar continues today at 4pm GMT with @sirianned.bsky.social presenting “Elites as Democratic Gatekeepers”. Join us in London or on Zoom, co-organised with @sarahobolt.bsky.social, @florianfoos.bsky.social & @mathiaspoertner.bsky.social ✍️
Elites as Democratic Gatekeepers: Theory and Evidence from Norway

Studies of democratic backsliding suggest that political elites can, but often fail to, serve as "democratic gatekeepers" by punishing autocratic colleagues to protect democracy. While there is a substantial body of literature examining voters' preferences for democracy and their reactions to democratic violations by elites, we know less about elites' preferences for democratic gatekeeping in contemporary democracies. We develop a theory of democratic gatekeeping among political elites in democracies, examining the practice within and between parties. We test the implications of this theory in pre-registered surveys targeting approximately 8,000 national and local elected representatives and party officials in Norway. Through various experimental approaches, we reveal the gatekeeping preferences of Norwegian political elites when exposed to anti-democratic party colleagues and political parties as potential coalition partners.
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Konstantin Bogatyrev @bogatyrev.bsky.social · 05/02/2026
Today at 4pm GMT: Elisa Wirsching (@lsegovernment.bsky.social) is presenting "The Political Consequences of Police Slowdowns" at our Political Behaviour Seminar, organised together with @sarahobolt.bsky.social, @florianfoos.bsky.social & @mathiaspoertner.bsky.social. Join us in London or on Zoom!
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Florian Foos @florianfoos.bsky.social · 29/01/2026
Excited about chairing @bogatyrev.bsky.social in the @lsegovernment.bsky.social Political Behaviour Seminar at 4pm today. Konstantin will present his paper "Shifting Ground". Come along if you are in London, or join us on Zoom: www.lse.ac.uk/government/r...
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Mathias Poertner @mathiaspoertner.bsky.social · 29/01/2026
Excited to welcome Kenneth F. Greene at the LSE Latin American Politics Seminar series today *12:00 - 1:30 pm UK time* (in-person and online). He will present parts of his new book “Against the Machine: Why Party Competition Disrupts Vote Buying” @lsegovernment.bsky.social
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Mathias Poertner @mathiaspoertner.bsky.social · 27/01/2026
Looking forward to all the exciting talks in the LSE Latin American Politics Seminar (LAPS) series this term! Talks will be on-campus (open to anyone interested) but you can also join remotely. www.lse.ac.uk/government/r... @lsegovernment.bsky.social
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Sara Hobolt @sarahobolt.bsky.social · 31/10/2025
🚨 EPSS Belfast 2026 Call for Papers - One week to go! 🚨 Don't forget to submit your paper or panel proposal to the European Political Science Society @epssnet.bsky.social 2026 conference - just one week to go before the deadline: epssnet.org/belfast-2026...
epssnet.org
Call for Papers | EPSS Belfast 2026 Conference
Submit your abstract or full paper for EPSS Belfast 2026. Share cutting‑edge political science research, network with peers & contribute to academic impact.
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Macartan Humphreys @macartan.bsky.social · 03/11/2025
Please share!: Last week to apply for @epssnet.bsky.social Belfast 2026 really good news is that there's been an amazing response to the call for papers already; now very excited for this meeting ⬇️ We put together a quick FAQ on Qs that have come up on submitting: epssnet.org/conferences/...
epssnet.org
EPSS 2026 submissions FAQ - EPSS
Submissions are coming in fast for Belfast 2026 and so are your questions about submissions. Here are answers to the most common questions: Where do I go to submit? For panel submission: https://app.oxfordabstracts.com/events/75765/symposia/create For paper submission: https://app.oxfordabstracts.com/stages/79266/submissions/new? How many papers can I submit? We put a constraint of max one presentation per person. This does …
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Konstantin Bogatyrev @bogatyrev.bsky.social · 02/10/2025
Today we kick off this year’s Political Behaviour Seminar series at @lsegovernment.bsky.social with @alicirone.bsky.social on gender dynamics in online deliberation. Glad to co-host the seminars with @florianfoos.bsky.social, @sarahobolt.bsky.social and @mathiaspoertner.bsky.social! Details below 👇
Gender Dynamics in Online Deliberation: Evidence from the 2023 Meta Community Forum on AI Chatbots

Deliberative mini-publics are currently being employed throughout the world, and it has been well documented that women are less likely to exercise their voice in deliberation.  Yet the advent of digital platforms that host discussions online could mitigate this gender gap, and make it easier to test theories about the design of deliberative institutions. Increasing descriptive representation — the number of women in a discussion group — could potentially improve women's frequency of participation and quality of experience; however, we know less about how these dynamics play out in deliberative settings that take place entirely online. Here, we leverage unique data from the 2023 Meta Community Forum on AI Chatbots, which brought together 1,541 people in a Deliberative Polling exercise that took place on a digital platform. Thanks to random assignment, the gender composition of each discussion room varies. We exploit the group composition to estimate how the number of female members in each group affects participation (as measured by speaking frequency and activity during the session), as well as self-reported measures of efficacy and satisfaction with deliberative processes. We find some descriptive evidence of a gender gap, but little to no effects of room composition on participation or evaluation; this has surprising implications for the design of digital deliberation.
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Mathias Poertner @mathiaspoertner.bsky.social · 11/09/2025
Excited and honored that “Creating Partisans” has won the Leon Epstein Outstanding Book Award for its contributions to research on pol. organizations and parties from @apsa.bsky.social! Many thanks to the committee & everyone who helped improve the book! @cambup-polsci.cambridge.org
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Sara Hobolt @sarahobolt.bsky.social · 11/09/2025
I am so excited that this excellent line-up of speakers are presenting in the LSE @lsegovernment.bsky.social Political Behaviour seminar series this term! 👇
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Florian Foos @florianfoos.bsky.social · 11/09/2025
Here is our speaker line-up: @alicirone.bsky.social, @lalamur.bsky.social, @aalrababah.bsky.social, @aliz-toth.bsky.social, @profrosiecamp.bsky.social, @bogatyrev.bsky.social, @thchau.bsky.social, @sirianned.bsky.social, @simonhix.bsky.social, @gaetanoinglese.bsky.social, @aecoppock.bsky.social ...
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Florian Foos @florianfoos.bsky.social · 11/09/2025
The @lsegovernment.bsky.social Political Behaviour Seminar Series will be back for the '25/26 academic year, as usually on Thursdays, 4-5pm, in CBG 4.17. Let us know if you are external and want to attend in-person, or join remotely on Zoom. More info here: www.lse.ac.uk/government/r...
lse.ac.uk
Political Behaviour
The Political Behaviour research group brings together faculty and students from across the LSE to share research on public opinion, voting and elections.
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Anita Gohdes @argohdes.bsky.social · 30/06/2025
If you’re a political scientist please consider joining @epssnet.bsky.social as a member to help support this new (not for profit!) organization and the next European Political Science Conference in 2026 in Belfast 👇 If that’s not in the budget: spreading the word is just as important 😊
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Danbischof @danbischof.bsky.social · 20/05/2025
📢📢📢 JOBS: 4 postdocs 📢📢📢 Uni Münster has opened a call for 4! postdoc positions. I'm involved in one hiring and really hope that suitable candidates (in particular quants) apply! Why would you apply? Check out @thiloalbers.bsky.social FAQ! sites.google.com/site/tnhalbe...
sites.google.com
Thilo N. H. Albers - Job ads
2 years postdoc with a thematic focus on Migration, Diaspora, Citizenship
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Florian Foos @florianfoos.bsky.social · 25/04/2025
"The reader doesn’t care how it felt to write. They care how it feels to read." Fantastic piece about academic writing.
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Mathias Poertner @mathiaspoertner.bsky.social · 03/04/2025
Excited to welcome @dbroockman.bsky.social at the @lsegovernment.bsky.social Political Behaviour seminar today! He will present a paper on “How Constituent Contact Reinforces the Status Quo: Evidence from Administrative Records on Contact to Congress” today *4-5 pm UK time* (in-person or online)
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Mathias Poertner @mathiaspoertner.bsky.social · 13/03/2025
Exciting news to share — I have been awarded tenure and promoted to Associate Professor @lsegovernment.bsky.social! I’m immensely grateful for the support and guidance from colleagues, mentors, and students, and I’m looking forward to the journey ahead!
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Mathias Poertner @mathiaspoertner.bsky.social · 07/02/2025
Come and do a postdoc with us… 👇
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Mathias Poertner @mathiaspoertner.bsky.social · 06/02/2025
The @lsegovernment.bsky.social Political Behaviour seminar is hosting @seonghuilee.bsky.social for a talk on “Gender and the ‘misinformed’ type: Are men more ‘confidently wrong’ about political facts?” today *4-5 pm UK time* (in-person or online)
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Mathias Poertner @mathiaspoertner.bsky.social · 30/01/2025
Excited to welcome Nan Zhang at the @lsegovernment.bsky.social Political Behaviour seminar today! He will present a paper on “The Upside of Prejudice: Do Muslims in Europe Enjoy a Religious Trust Premium?” today *4-5 pm UK time* (in-person or online)
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Mathias Poertner @mathiaspoertner.bsky.social · 23/01/2025
Excited to welcome Swen Hutter at the @lsegovernment.bsky.social Political Behaviour seminar today! He will present a paper on “What’s in a Name? Party Branding in Europe” today *4-5 pm UK time* (in-person or online)
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Len Metson @lenmetson.com · 02/01/2025
Really exciting opportunity to apply your research design skills by helping design, execute, and analyse a range of experiments with Campaign Lab ⬇️ Really happy to chat to anyone considering applying! :)
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Mathias Poertner @mathiaspoertner.bsky.social · 02/12/2024
It's finally here! 🤗 So happy to hold an *actual copy* of the book in my hands!
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Mathias Poertner @mathiaspoertner.bsky.social · 29/11/2024
🎉 Thrilled that my new book, *Creating Partisans: The Organizational Roots of New Parties in Latin America*, is finally out! 🎉 @cambridgeup.bsky.social www.cambridge.org/us/universit... A brief summary: 1/n
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Mathias Poertner @mathiaspoertner.bsky.social · 28/11/2024
Excited to welcome @antvalentim.bsky.social at the @lsegovernment.bsky.social Political Behaviour seminar today! He will present his paper "Climate Change and Political Entry: Evidence from Brazilian Municipal Elections" today *4-5 pm UK time* (in-person or online)
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Mathias Poertner @mathiaspoertner.bsky.social · 21/11/2024
Excited to welcome Andreas E. Felmann & Juan Pablo Luna at the LSE Latin American Politics Seminar series today *12:00 - 1:30 pm UK time* (in-person and online). They will present their new book “Criminal Politics and Botched Development in Contemporary Latin America” @lsegovernment.bsky.social
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Carl Müller-Crepon @carlmc.bsky.social · 19/11/2024
🚨 UCL Conflict and Change PhD Workshop 2025 Call for Papers, deadline 8 Dec. Apply, it’s a fantastic workshop and crowd! t.co/rMWGimGtlw
Screenshot of twitter post with workshop ad
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Mathias Poertner @mathiaspoertner.bsky.social · 24/09/2024
The LSE Latin American Politics Seminar series is back this year with an exciting lineup of speakers... Talks will be on-campus (open to anyone interested) but you can also join us remotely: lse.ac.uk/government/r...
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Mathias Poertner @mathiaspoertner.bsky.social · 28/05/2024
I can’t believe this is actually happening… I recently received the final cover for my book Creating Partisans that is coming out in August! More on the book soon! www.cambridge.org/core/books/c...
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Mathias Poertner @mathiaspoertner.bsky.social · 02/05/2024
Excited to welcome @fortunato.bsky.social at the LSE Political Behaviour seminar today! He will present a paper on “How Voters Predict Coalition Bargaining Outcomes” today *4-5 pm UK time* (in-person or online)
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Mathias Poertner @mathiaspoertner.bsky.social · 26/03/2024
Excited to welcome Jazmin Sierra at the LSE Latin American Politics Seminar series today *12:00 - 1:30 pm UK time* (in-person and online). She will present her paper “Globalized State-led Development: Industrial Policy and Outward Foreign Direct Investments in Brazil”
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Mathias Poertner @mathiaspoertner.bsky.social · 21/03/2024
Excited to welcome @adelineylo.bsky.social to the LSE Political Behaviour seminar today! She will present her paper “How increasing refugee visibility on TV news causes viewers to support refugees more, but like them less” today *4-5 pm UK time* (in-person or online)
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Mathias Poertner @mathiaspoertner.bsky.social · 07/03/2024
Excited to welcome @yamilrvelez.bsky.social at the LSE Political Behaviour seminar today! He will present “Do Personal Issue Priorities Trump Group Policies? Exploring the Impact of Deeply-Held Issues among Latinos using Personalized Conjoint Experiments” today *4-5 pm UK time* (in-person or online)
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Mathias Poertner @mathiaspoertner.bsky.social · 29/02/2024
Excited to welcome @zeynsom.bsky.social at the LSE Political Behaviour seminar today! She will present her paper “Personal Issue Importance Effects on Voters' Perceptual Accuracy of Party Issue Positions” (with Patrick Fournier & Ruth Dassonneville) *4-5 pm UK time* (in-person or online).
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Mathias Poertner @mathiaspoertner.bsky.social · 15/02/2024
Excited to welcome Maria Victoria Murillo at the LSE Latin American Politics Seminar series today *12:00 - 1:30 pm UK time* (in-person and online). She will present her paper (with Jorge Mangonnet) “Rural Unrest and Economic Prosperity”
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Mathias Poertner @mathiaspoertner.bsky.social · 14/02/2024
Join us for a talk by Simón Escoffier in our LSE Latin American Politics Seminar series today *1:00 - 2:00 pm UK time* (in-person and online). He will present his new book “Mobilizing at the Urban Margins: Citizenship and Patronage Politics in Post-Dictatorial Chile”
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Mathias Poertner @mathiaspoertner.bsky.social · 08/02/2024
Excited to welcome @dianebolet.bsky.social at the LSE Political Behaviour seminar today! She will present “Does Financial Assistance Mitigate Rural Backlash? The Case of the Common Agricultural Policy in France” (with @giorgiomalet.bsky.social) today *4-5 pm UK time*
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Mathias Poertner @mathiaspoertner.bsky.social · 08/02/2024
Join us for an exciting talk by Timothy Power in our LSE Latin American Politics Seminar series on “The Brazilian Political Right: Ideological and Factional Change” today *12:00 - 1:30 pm UK time* (in-person and online)
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Mathias Poertner @mathiaspoertner.bsky.social · 01/02/2024
Join us for an exciting talk by @valentimvicente.bsky.social at the LSE Political Behaviour seminar today! He will present his book project on “The Normalization of the Radical Right” today *4-5 pm UK time* (in-person or online)
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Mathias Poertner @mathiaspoertner.bsky.social · 25/01/2024
Looking forward to today's LSE Political Behaviour seminar with Nick Lewis! Join us for his talk "Testing the Spiral of Silence Theory on Facebook" today *4-5 pm UK time*
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Florian Foos @florianfoos.bsky.social · 21/12/2023
Two new TT positions with our friends at the LSE European Institute! Get in touch with @miguelpereira.bsky.social if you have questions👇
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Miguel Pereira @miguelpereira.bsky.social · 19/12/2023
🚨🚨Two tenure-track positions in the European Institute @LSE: 1. European Politics and Policy jobs.lse.ac.uk/Vacancies/W/... 2. Political Economy jobs.lse.ac.uk/Vacancies/W/... It's a really great place to work. Consider applying! I won't be in the search committee but happy to chat. 1/2 polisky
jobs.lse.ac.uk
Assistant Professor in European Politics and Policy
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