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Mariano Beguerisse

@beguerisse

Applied mathematician and researcher at Spotify. I post mainly about research, cycling and music.

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26.11.2024
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Latest posts by Mariano Beguerisse @beguerisse

Preview
Sound Within Sound by Kate Molleson review โ€“ a challenge to the gatekeepers of classical music This clever and compelling collection of essays sings the praises of 10 thrilling artists whose work has been excluded from the classical canon

Also Kate Molleson's amazing book Sound Within Sound has a chapter on her www.theguardian.com/books/2022/j...

26.02.2026 20:14 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Acoustic Hits is such a fantastic album. Its versions of High and Cut Here are probably my favourite recordings by The Cure ever

04.02.2026 20:02 ๐Ÿ‘ 2 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
Spotify - 2026 Summer Internship, Research Scientist - PhD (London) Spotify is looking for enthusiastic students/recent graduates with a passion for music and an ambition to go far. This isn't just any internship! Our paid internship program will give you the chance t...

๐ŸงชMy team at Spotify is looking for PhD students for a summer internship in our London office. Potential topics include multimodal content understanding, computer vision, NLP, graph ml, Gen AI content detection, entity resolution and linking, knowledge graphs, etc. jobs.lever.co/spotify/5d94...

03.02.2026 21:23 ๐Ÿ‘ 0 ๐Ÿ” 2 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
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You have a background in math/physics/computer science/ML and are looking for an interdisciplinary postdoc fellowship in life sciences with free choice of host groups? Then join us at the CSBD as an ELBE postdoc! The application deadline is the 13 of March

28.01.2026 08:19 ๐Ÿ‘ 11 ๐Ÿ” 9 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 1
What are the dynamic effects of fact-checking on the behavior of those who circulate misinformation and on the spread of false news? In this paper, we provide causal evidence on these questions, building on a unique partnership with the Agence France Presse (AFP), the world's largest fact-checking organization and a partner of Facebook's Third-Party Fact-Checking Program. Over an 18-month period (December 2021-June 2023), we collected information on the stories proposed by fact-checkers during the daily editorial meetings, some of which were ultimately fact-checked while others, despite being ex ante "similar", were left aside. Using two complementary Difference-inDifferences approaches, one at the story level and the other at the post level (within fact-checked stories), we show that fact-checking reduces the circulation of misinformation on Facebook by approximately 8%, an effect driven entirely by stories rated as "False." Furthermore, we provide evidence of behavioral responses: the publication of a fact-check more than doubles the deletion of posts in the fact-checked stories, and users whose posts appear in fact-checked stories become less likely to share misinformation in the future. While our results clearly confirm the effectiveness of fact-checking, we provide policy recommendations to further strengthen its impact.

What are the dynamic effects of fact-checking on the behavior of those who circulate misinformation and on the spread of false news? In this paper, we provide causal evidence on these questions, building on a unique partnership with the Agence France Presse (AFP), the world's largest fact-checking organization and a partner of Facebook's Third-Party Fact-Checking Program. Over an 18-month period (December 2021-June 2023), we collected information on the stories proposed by fact-checkers during the daily editorial meetings, some of which were ultimately fact-checked while others, despite being ex ante "similar", were left aside. Using two complementary Difference-inDifferences approaches, one at the story level and the other at the post level (within fact-checked stories), we show that fact-checking reduces the circulation of misinformation on Facebook by approximately 8%, an effect driven entirely by stories rated as "False." Furthermore, we provide evidence of behavioral responses: the publication of a fact-check more than doubles the deletion of posts in the fact-checked stories, and users whose posts appear in fact-checked stories become less likely to share misinformation in the future. While our results clearly confirm the effectiveness of fact-checking, we provide policy recommendations to further strengthen its impact.

When FB introduced its fact-checking program, it claimed (w/out evidence, despite our asking) that it reduced exposure to debunked content by 80%. When Meta killed fact-checking in the US, Zuck claimed (without evidence) that it didn't work. Both lies. The truth? ~8%:
dx.doi.org/10.2139/ssrn...

08.01.2026 20:32 ๐Ÿ‘ 9 ๐Ÿ” 2 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

That album is a joy. Especially Slonimskyโ€™s Earbox. I remember when I first heard it live... ๐Ÿคฏ

08.01.2026 20:01 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
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My applied math colleague Chris Earls is looking to hire a postdoc. The area โ€” interpretability of emergent behaviors exhibited by AI systems โ€” is fascinating and important. Info below:

06.01.2026 00:07 ๐Ÿ‘ 23 ๐Ÿ” 8 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
Job posting on LinkedIn for a Research Scientist position in YY Ahn's group at UVA.

Job posting on LinkedIn for a Research Scientist position in YY Ahn's group at UVA.

The incredible @yyahn.bsky.social is building something special at UVA.

๐Ÿšจ If you're a fit for this job, I highly recommend applying!

Find more details via the link below.

www.linkedin.com/posts/yyahn_...

10.12.2025 18:01 ๐Ÿ‘ 4 ๐Ÿ” 2 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Cosmic Sea is my jam

07.12.2025 16:03 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Weโ€™re launching the Earth Rover Program - trying to make geophysics actually usable for farmers. That means tackling the ridiculous price of equipment and opening up a global, easy-to-use dataset so anyone, anywhere around the globe, can understand whatโ€™s happening under their feet.

05.12.2025 10:12 ๐Ÿ‘ 136 ๐Ÿ” 36 ๐Ÿ’ฌ 4 ๐Ÿ“Œ 2

Science is supposed to know no borders, until every major conference in my field picks the most hostile country to travel to as its venue ๐Ÿ’†๐Ÿผ

#Epidemics10 #NetSci2026 #CCS2026 #IC2S2 ๐Ÿ‡บ๐Ÿ‡ธ

03.12.2025 16:11 ๐Ÿ‘ 2 ๐Ÿ” 1 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
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Signed Networks: theory, methods, and applications Signed networks provide a principled framework for representing systems in which interactions are not merely present or absent but qualitatively distinct: friendly or antagonistic, supportive or confl...

Signed Networks: theory, methods, and applications arxiv.org/abs/2511.17247

24.11.2025 08:07 ๐Ÿ‘ 6 ๐Ÿ” 3 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

This week's post is a blast from the past: my now year-ish-old sci am feature about the discovery of new 3D shapes that fill space without corners and which appear in art and nature.

Thanks to my contract terms I was able to break it out of paywall jail and share it for free:

20.11.2025 15:27 ๐Ÿ‘ 10 ๐Ÿ” 3 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 1
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Our inaugural Regius Professor of Mathematics, Andrew Wiles, retires in 2026 (not that mathematicians ever truly retire) and we are looking for his successor, starting in October of that year.

Full details: www.maths.ox.ac.uk/node/74751

18.11.2025 16:25 ๐Ÿ‘ 3 ๐Ÿ” 5 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

๐Ÿค˜

05.11.2025 20:29 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

We're looking for a postdoc for our new project on forecasting technological change - more details below

03.11.2025 15:49 ๐Ÿ‘ 7 ๐Ÿ” 5 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
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JOB OPPORTUNITY: Post Doctoral Research Associate in the Economics of Technological Change (2yr) โžต https://www.inet.ox.ac.uk/vacancies
Join the @oxmartinschool.bsky.socialย Prog. on Forecasting Technological Change, led byย @francoislafond.bsky.socialย ,ย @doynefarmer.bsky.socialย &ย @maxroser.bsky.social

03.11.2025 13:03 ๐Ÿ‘ 6 ๐Ÿ” 4 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 1
As a Visiting Faculty ยฉ 2025ย CSBD

Our call for ELBE Visiting Faculty at the Center for Systems Biology Dresden is live with deadline 30 November: www.csbdresden.de/join-us/as-a... Please visit us during your sabbatical!
@mpi-cbg.de @math-mpicbg.bsky.social @csbdresden.bsky.social

31.10.2025 13:42 ๐Ÿ‘ 11 ๐Ÿ” 5 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 2

I had to do a triple check in the title. Awesome stuff @lordgrilo.bsky.social

29.10.2025 17:19 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
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This month, no colloquium but a special session about careers in network science! Join us and an all-star panel on October 29. Register here for a Zoom link: iu.zoom.us/webinar/regi...

13.10.2025 20:45 ๐Ÿ‘ 25 ๐Ÿ” 19 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 1
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Thursday in Lima, Perรบ! classic.joinnus.com/events/conce...

27.10.2025 17:25 ๐Ÿ‘ 23 ๐Ÿ” 1 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
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Modeling Artist Influence for Music Selection and Recommendation: A Purely Network-Based Approach Forthcoming. Now Available: Just Accepted Version.

Super happy that my paper on modeling artist networks is out on Harvard Data Science Review. Writing it was such a fun journey (and still so much to be done, which is the best part!) hdsr.mitpress.mit.edu/pub/t4txmd81...

22.10.2025 12:45 ๐Ÿ‘ 17 ๐Ÿ” 5 ๐Ÿ’ฌ 3 ๐Ÿ“Œ 1

We just advertised the Hooke Fellowships for exceptional researchers (typically after their first post-doc).

You are completely free to set up your own research agenda for three years.

RT please

my.corehr.com/pls/uoxrecru...

21.10.2025 17:38 ๐Ÿ‘ 12 ๐Ÿ” 6 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 1
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Research fellowships Are you considering Imperialโ€™s Department of Physics as your host institution for a research fellowship? Weโ€™re delighted you\'re explorin...

๐Ÿš€ EPSRC Mathematical Sciences Fellowships

Looking to launch or strengthen your independent research career in mathematical sciences? Imperial Physics welcomes nominations from all backgrounds.

๐Ÿ“Œ Submit your EOI & CV: see our fellowships page www.imperial.ac.uk/physics/oppo...

#ResearchFellowships

27.09.2025 17:25 ๐Ÿ‘ 1 ๐Ÿ” 2 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
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Come fly with us, let's fly, let's fly away.

Full details: www.maths.ox.ac.uk/node/74169

26.09.2025 15:58 ๐Ÿ‘ 8 ๐Ÿ” 7 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
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Probability can be counterintuitive. Or, to put it another way, plain baffling. But there's always an explanation. Becky Crossley picks her favourite example. And tries to draw a goat.

Watch the full video (with extra maths): youtu.be/zf17UgsFYCw

21.09.2025 14:44 ๐Ÿ‘ 10 ๐Ÿ” 3 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
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Network representations reveal structured uncertainty in music Music, as a structured yet perceptually rich experience, can be modeled as a network to uncover how humans encode and process auditory information. While network-based representations of music are inc...

Network representations reveal structured uncertainty in music arxiv.org/abs/2509.14053

19.09.2025 08:19 ๐Ÿ‘ 11 ๐Ÿ” 6 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
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New preprint: We study Lotka-Volterra ecological dynamics through computational algebraic geometry. By encoding feasibility & stability on the real Grassmannian, we prove certain ecological networks are mathematically impossible ๐Ÿงฎ๐ŸŒฟ arxiv.org/abs/2509.00165

03.09.2025 18:14 ๐Ÿ‘ 16 ๐Ÿ” 9 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 1
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Cigarette filters do nothing for smokersโ€™ health and just create plastic pollution โ€“ they should be banned Cigarette filters are one of the biggest sources of plastic pollution and they serve no purpose.

'Every year, 4.5 trillion cigarette butts are discarded โ€“ making them the most littered item on the planet.'

Dr Jonathan Livingstone-Banks and Dr Jamie Hartmann-Boyce on why cigarette filters should be banned โฌ‡๏ธ #OxfordClimate

29.08.2025 15:18 ๐Ÿ‘ 9 ๐Ÿ” 5 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 1
Speech and Language Processing Speech and Language Processing

Now that school is starting for lots of folks, it's time for a new release of Speech and Language Processing! Jim and I added all sorts of material for the August 2025 release! With slides to match! Check it out here: web.stanford.edu/~jurafsky/sl...

24.08.2025 19:28 ๐Ÿ‘ 150 ๐Ÿ” 59 ๐Ÿ’ฌ 3 ๐Ÿ“Œ 4