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Mathias Wullum Nielsen

@mathiaswullum

Associate Professor, Department of Sociology, UCPH. https://mathiaswullumnielsen.weebly.com/

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21.09.2023
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Latest posts by Mathias Wullum Nielsen @mathiaswullum

We often treat education as the primary engine of social mobility, but conventional models may be overestimating its impact.

Not correcting for selection into schooling will artificially inflate any indirect effect through schooling...

1/3

#socialmobility #sociology

09.03.2026 09:45 πŸ‘ 8 πŸ” 5 πŸ’¬ 1 πŸ“Œ 2

The people wearing masks are scanning your face to capture your identity.

15.01.2026 20:07 πŸ‘ 1074 πŸ” 401 πŸ’¬ 38 πŸ“Œ 22
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It begins. Clearly incriminating evidence against president of the United States.

Epstein to Maxwell, April 2, 2011:

"i want you to realize that that dog that hasn't barked is trump. [VICTIM] spent hours at my house with him ,, he has never once been mentioned. police chief. etc."

12.11.2025 13:51 πŸ‘ 3983 πŸ” 1323 πŸ’¬ 97 πŸ“Œ 109

Super cool, Roman!

06.11.2025 19:35 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Four three-year postdoctoral positions in the project Slow-Motion Democracy - Vacancy at Aarhus University Vacancy at Department of Political Science, Aarhus University

Four (!) three-year postdoc positions available at @au.dk: international.au.dk/about/profil...

Join an incredible team & help understand the psychological & political implications of the clash between high-speed society & slow-speed democracy.

Please share! @tboeggild.bsky.social can help with Qs

06.11.2025 14:14 πŸ‘ 30 πŸ” 35 πŸ’¬ 0 πŸ“Œ 1
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Sage Journals: Discover world-class research Subscription and open access journals from Sage, the world's leading independent academic publisher.

Out now in @actasociologica.bsky.social: β€œMomentary symbols: Tracing the visual expressions of collectives”

with @nicolemilmandoerr.bsky.social & @mathiaswullum.bsky.social

journals.sagepub.com/doi/10.1177/...

A🧡 on our approach and findings:

30.09.2025 13:38 πŸ‘ 9 πŸ” 4 πŸ’¬ 1 πŸ“Œ 2
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How are cultural tastes stratified? Evidence from library borrowing for the entire population of Denmark Abstract. Research shows that cultural tastes are socially stratified. Yet, most of this research relies on small-sample surveys and includes only a few di

Even in Denmark, cultural tastes are socially stratified. With some quite cool library data we find strong gradients by education and wealth - important as wealth is rarely studied in cultural stratification research

doi.org/10.1093/esr/...
OA: osf.io/ar2xc_v2/dow...
@europeansocreview.bsky.social

29.09.2025 10:57 πŸ‘ 138 πŸ” 38 πŸ’¬ 4 πŸ“Œ 4
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Call for two or more open-rank academic positions in Sociology

Dept. of Soc. at the Uni of Copenhagen invites applications for two or more open-rank professorships!

We cover a wide range of topics and and methods, and welcome candidates with new research agendas or profiles that complement our existing strenghts.

Details here: jobportal.ku.dk/videnskabeli...

12.09.2025 14:05 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Now imagine all your best scientists leaving your country because they’re paid far more across the pond.

21.08.2025 09:31 πŸ‘ 12 πŸ” 1 πŸ’¬ 0 πŸ“Œ 1
Cover page for the manuscript: Morey, R. D., & Davis-Stober, C. P. (2025). On the poor statistical properties of the P-curve meta-analytic procedure. Journal of the American Statistical Association, 1–19. https://doi.org/10.1080/01621459.2025.2544397

Cover page for the manuscript: Morey, R. D., & Davis-Stober, C. P. (2025). On the poor statistical properties of the P-curve meta-analytic procedure. Journal of the American Statistical Association, 1–19. https://doi.org/10.1080/01621459.2025.2544397

Abstract for the paper: The P-curve (Simonsohn, Nelson, & Simmons, 2014; Simonsohn, Simmons, & Nelson, 2015) is a widely-used suite of meta-analytic tests advertised for detecting problems in sets of studies. They are based on nonparametric combinations of p values (e.g., Marden, 1985) across significant (p < .05) studies and are variously claimed to detect β€œevidential value”, β€œlack of evidential value”, and β€œleft skew” in p values. We show that these tests do not have the properties ascribed to them. Moreover, they fail basic desiderata for tests, including admissibility and monotonicity. In light of these serious problems, we recommend against the use of the P-curve tests.

Abstract for the paper: The P-curve (Simonsohn, Nelson, & Simmons, 2014; Simonsohn, Simmons, & Nelson, 2015) is a widely-used suite of meta-analytic tests advertised for detecting problems in sets of studies. They are based on nonparametric combinations of p values (e.g., Marden, 1985) across significant (p < .05) studies and are variously claimed to detect β€œevidential value”, β€œlack of evidential value”, and β€œleft skew” in p values. We show that these tests do not have the properties ascribed to them. Moreover, they fail basic desiderata for tests, including admissibility and monotonicity. In light of these serious problems, we recommend against the use of the P-curve tests.

Paper drop, for anyone interested in #metascience, #statistics, or #metaanalysis! @clintin.bsky.social and I show in a new paper in JASA that the P-curve, a popular forensic meta-analysis method, has deeply undesirable statistical properties. www.tandfonline.com/doi/full/10.... 1/?

08.08.2025 18:55 πŸ‘ 290 πŸ” 122 πŸ’¬ 17 πŸ“Œ 27

Du poids du racismes dans les inΓ©galitΓ©s de revenus en France

17.07.2025 20:02 πŸ‘ 13 πŸ” 7 πŸ’¬ 0 πŸ“Œ 0

The Supreme Court is out of control. To allow the president, without any explanation, to unilaterally dismantle agencies created by an Act of Congress is to endow the president with sovereignty. There is no justification, because they haven’t given one. Our country is in big trouble.

14.07.2025 19:46 πŸ‘ 4441 πŸ” 1397 πŸ’¬ 115 πŸ“Œ 62

When I got tenure, I decided to use it start a new research agenda, studying US science in the 20th century, how it became dominant, what held it back, and what we can do better. Here's the first pub (with Scott Kim).

14.07.2025 17:36 πŸ‘ 104 πŸ” 16 πŸ’¬ 2 πŸ“Œ 0
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A 30% tariff on EU exports would hurt businesses, consumers and patients on both sides of the Atlantic.

We will continue working towards an agreement by August 1.

At the same time, we are ready to safeguard EU interests on the basis of proportionate countermeasures.

β†’ europa.eu/!tPvKn8

12.07.2025 13:57 πŸ‘ 1423 πŸ” 317 πŸ’¬ 243 πŸ“Œ 47

"...male-dominated STEM programs actually rate female applicants’ written application materials and interviews higher. Female applicants are still less likely admitted to such programs than males..."

This month in our journal, @sociologicalsci.bsky.social

06.07.2025 20:14 πŸ‘ 21 πŸ” 7 πŸ’¬ 0 πŸ“Œ 0

Every cut that the government makes to social services is effectively a tax on women. Because they're the ones who will be expected to fill in the gaps.

29.06.2025 13:00 πŸ‘ 1910 πŸ” 737 πŸ’¬ 16 πŸ“Œ 35
4 men in jeans, t-shirts, bullet proof vests, balaclavas pulled up to their eyes, hats. They are armed and have badges but are not in uniform. They look both incredibly menacing and unbelievably dumb. They are standing at the end of an office hallway.

4 men in jeans, t-shirts, bullet proof vests, balaclavas pulled up to their eyes, hats. They are armed and have badges but are not in uniform. They look both incredibly menacing and unbelievably dumb. They are standing at the end of an office hallway.

It is true that sometimes New York City is frightening. For example today these men were loitering in the hallway of the 12th floor of the federal building.

20.06.2025 19:53 πŸ‘ 2814 πŸ” 720 πŸ’¬ 90 πŸ“Œ 104
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How My Reporting on the Columbia Protests Led to My Deportation As an Australian who wrote about the demonstrations while on campus, I gave my phone a superficial clean before flying to the U.S. I underestimated what I was up against.

This is shocking. Pure totalitarianism from DHS, and also blatantly unconstitutional.

www.newyorker.com/news/the-led...

19.06.2025 15:18 πŸ‘ 6697 πŸ” 2277 πŸ’¬ 127 πŸ“Œ 118
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Interesting discussions at our Funders Panel #ICSSI2025

16.06.2025 10:06 πŸ‘ 6 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
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Our first invited speaker Arnout van de Rijt @arnoutvanderijt.bsky.social just kicked off the conference with a great talk on: Do grant proposal texts matter for funding decisions? A field experiment
#ICSSI2025

16.06.2025 07:37 πŸ‘ 7 πŸ” 3 πŸ’¬ 0 πŸ“Œ 0
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Fariba Karimi continues at #ICSSI2025 with gender-related themes in her phenomenal keynote "Inequalities in science and the impact of networks"

16.06.2025 09:07 πŸ‘ 10 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
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The conference was just opened by @hckongsted.bsky.social. Welcome everyone in Copenhagen, and enjoy the next 3 days at #ICSSI2025!

16.06.2025 07:33 πŸ‘ 6 πŸ” 3 πŸ’¬ 0 πŸ“Œ 0
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If we are all willing to dig in and sacrifice, by growing our red bars we can do our part in making the green bar even bigger.

15.06.2025 18:52 πŸ‘ 605 πŸ” 173 πŸ’¬ 23 πŸ“Œ 11

Cool! We have an ongoing project on Global North-South disparities in science, and would love to chat. Will read your work more carefully and reach out.

13.06.2025 15:50 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Wow. Congrats! Looks very cool.

12.06.2025 19:08 πŸ‘ 2 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
Screenshot of the draft's title page

Screenshot of the draft's title page

πŸ“„ Whose expert knowledge informs policymaking around the world?

@rsenninger.bsky.social and I analyze data from 1.2 million government policy documents from 185 countriesβ€”and find a prominent pattern:

🌍 Policy evidence is overwhelmingly sourced from the Global North.

Preprint: osf.io/w8q3y

πŸ§ͺπŸ§΅πŸ‘‡

12.06.2025 09:27 πŸ‘ 69 πŸ” 25 πŸ’¬ 5 πŸ“Œ 3
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Economists looking at an idea from sociology literature that they will be the first to write a paper on.

14.05.2025 14:15 πŸ‘ 632 πŸ” 72 πŸ’¬ 14 πŸ“Œ 14

Bernie Sanders' office has put out a report this morning on Trump's NIH cuts: "Trump officials effectively cut $2.7 billion in [NIH] funding in the first three months of 2025 – including a 31 percent cut to cancer research through March, compared to the same timeframe last year."

13.05.2025 12:51 πŸ‘ 736 πŸ” 284 πŸ’¬ 18 πŸ“Œ 14
Screenshot of a paper published in the Brill journal Comparative Sociology on 23 April 2025, title Stereotypes of the Intelligence of Nations, by Sebastian Jensen and Emil Kirkegaard

Screenshot of a paper published in the Brill journal Comparative Sociology on 23 April 2025, title Stereotypes of the Intelligence of Nations, by Sebastian Jensen and Emil Kirkegaard

Editorial Board
Thora Margareta Bertilsson, University of Copenhagen (Denmark)
Alfons Bora, Universitat Bielefeld (Germany)
Matteo Bortolini, University of Padua (Italy)
Vincenzo Cicchelli, UniversitΓ© Paris Descartes (France)
Jean-Pascal Daloz, University of Strasbourg (France)
Yves Dezalay, Ecole des Hautes Etudes en Sciences Sociales (EHESS), Paris (France)
Benjamin Gregg, University of Texas-Austin (USA)
Juergen R. Grote, UniversitΓ€t Potsdam and Hertie School of Governance, Berlin (Germany)
Jeffrey Halley, University of Texas-San Antonio (USA)
Andreas Hess, University College Dublin (Ireland)
John Higley, University of Texas-Austin (USA)
Hans-Joachim Lauth, WΓΌrzburg University (Germany)
Steven Levitsky, Harvard University (USA)
Andrea Maccarini, University of Padova (Italy)
Maria Malatesta, University of Bologna (Italy)
Wolfgang Merkel, WZB Berlin Social Science Center (Germany)
Leonardo Morlino, LUISS Guido Carli, Rome (Italy)
Gerardo Munck, University of Southern California, Los Angeles (USA)
Anton Pelinka, Central European University, Budapest (Hungary)
Huang Ping, Institute of American Studies, Chinese Academy of Social Sciences (China)
Masamichi Sasaki, Chuo University, Tokyo (Japan)
Carsten Schneider, Central European University, Budapest (Hungary)
Catalina Smulovitz, Universidad Torcuato Di Tella, Buenos Aires (Argentina)
Gunther Teubner, Johann Wolfgang Goethe-Universitat, Frankfurt (Germany)
Ming-Chang Tsai, National Taipei University (Taiwan)

Editorial Board Thora Margareta Bertilsson, University of Copenhagen (Denmark) Alfons Bora, Universitat Bielefeld (Germany) Matteo Bortolini, University of Padua (Italy) Vincenzo Cicchelli, UniversitΓ© Paris Descartes (France) Jean-Pascal Daloz, University of Strasbourg (France) Yves Dezalay, Ecole des Hautes Etudes en Sciences Sociales (EHESS), Paris (France) Benjamin Gregg, University of Texas-Austin (USA) Juergen R. Grote, UniversitΓ€t Potsdam and Hertie School of Governance, Berlin (Germany) Jeffrey Halley, University of Texas-San Antonio (USA) Andreas Hess, University College Dublin (Ireland) John Higley, University of Texas-Austin (USA) Hans-Joachim Lauth, WΓΌrzburg University (Germany) Steven Levitsky, Harvard University (USA) Andrea Maccarini, University of Padova (Italy) Maria Malatesta, University of Bologna (Italy) Wolfgang Merkel, WZB Berlin Social Science Center (Germany) Leonardo Morlino, LUISS Guido Carli, Rome (Italy) Gerardo Munck, University of Southern California, Los Angeles (USA) Anton Pelinka, Central European University, Budapest (Hungary) Huang Ping, Institute of American Studies, Chinese Academy of Social Sciences (China) Masamichi Sasaki, Chuo University, Tokyo (Japan) Carsten Schneider, Central European University, Budapest (Hungary) Catalina Smulovitz, Universidad Torcuato Di Tella, Buenos Aires (Argentina) Gunther Teubner, Johann Wolfgang Goethe-Universitat, Frankfurt (Germany) Ming-Chang Tsai, National Taipei University (Taiwan)

Is anyone here on the Editorial Board of the Brill journal Comparative Sociology? Raised a concern last year about 2 papers published in the journal which used "national IQ" data. The editor & ethics team dismissed my concern without an investigation. The journal has just published another NIQ paper

30.04.2025 07:32 πŸ‘ 36 πŸ” 12 πŸ’¬ 6 πŸ“Œ 2