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Petter Holme

@pholme

Scandinasian professor of network science & computational social science

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01.10.2023
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Latest posts by Petter Holme @pholme

Community structure unveils the path multiplicity in complex networks - Nature Communications Recent studies on path multiplicity have shown strong heterogeneity in shortest paths between node pairs in real-world networks. Here, authors reveal that community structure is a key factor shaping p...

New paper out in Nature Communications: πŸš¨πŸ“„https://www.nature.com/articles/s41467-026-70369-4
We hope to bring some oldskool netsci vibes to the weekend, dusting off the understudied characteristic of shortest-path multiplicity.

06.03.2026 15:35 πŸ‘ 4 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
Title page of the paper.

Title page of the paper.

🧡 New WP! w/ @selcanmutgan.bsky.social

Most segregation research examines neighborhoods, schools, or workplaces separately. But do individuals' exposure align across domains and persist over the life course? We fill this gap using 27 years of πŸ‡ΈπŸ‡ͺ data.

Pre-print: osf.io/eunwc_v1 (1/5)

02.03.2026 16:15 πŸ‘ 48 πŸ” 18 πŸ’¬ 1 πŸ“Œ 0
Preview
Spring '26

one season follows another . . my mix-tape for the spring 2026. 90 minutes, to fit your BASF:
open.spotify.com/playlist/02n...

01.03.2026 13:35 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

yes! I should read SAOB more, it would be cool to drop a phrase like "ymnig vedergΓ€llning i vΓ€nners tillgifvenhet" now and then :D

26.02.2026 13:36 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

I only know "vedergΓ€llning" in the sense of "retaliation" . . it certainly looks like it means "compensation" here, but with the gun in the picture, I would be nervous to return the bag . .

Nice find!

26.02.2026 08:29 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Yes, that much I think we (Scandinavians) even learned in school. 😊 But I'm curious what defines the other edges (in the background)? @abbasrizi.bsky.social told me some, but not all, are bloodlines. Do you see any pattern in the selection of nodes and edges?

25.02.2026 20:00 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Network of the day:
Turkish 16th-century miniature showing the Prophet Muhammad, the Rashidun Caliphs, and people related to them in various ways.

From commons.wikimedia.org/wiki/File:Tu... Shout out to
@abbasrizi.bsky.social for clarifications

25.02.2026 17:37 πŸ‘ 6 πŸ” 2 πŸ’¬ 2 πŸ“Œ 0
Preview
The 8th European Conference on Social Networks (EUSN 2026) The 8th European Conference on Social Networks (EUSN 2026) will take place on 11–15 August 2026 in NorrkΓΆping, Sweden, hosted by the Institute for Analytical Sociology (IAS), LinkΓΆping University. The...

Are you a social network researcher using mixed methods?

We invite you to contribute to the "Mixed Methods for Social Network Analysis" session at EUSN2026, co-organised with @franciscaortizruiz.bsky.social & @mirandalubbers.bsky.social

Apply by 1 March liu.se/en/event/eus...

See you in Sweden!

25.02.2026 10:23 πŸ‘ 11 πŸ” 10 πŸ’¬ 0 πŸ“Œ 1
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Network of the day: The piping of an Iraqi refinery.

From dame.exeter.ac.uk/en/home/

22.02.2026 12:57 πŸ‘ 4 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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The Song of the Banyan Tree
@jasonsinghthing, the Mozart (or maybe Brian Eno) of Biosonfication, attaches electrodes to our banyan tree to record its biofeedback and turn into a soundtrack for Tishani Doshi to dance to @oliviafraserart's British Council show, A Journey Within, opening Thursday

21.02.2026 12:14 πŸ‘ 46 πŸ” 15 πŸ’¬ 2 πŸ“Œ 0
TENET@NetSci2026

🚨Deadline extension🚨

If you’re interested in Temporal Networks, don’t miss the chance to submit your work to the TENET satellite @netsciconf.bsky.social in Boston!
πŸ“… New deadline: 2 March
πŸ“ Submit two page abstract

More info here: tinyurl.com/4zevnyft

16.02.2026 14:06 πŸ‘ 2 πŸ” 4 πŸ’¬ 0 πŸ“Œ 0
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Come and join our Discrete Laplacian workshop in Dresden, Germany πŸ™Œ!

With Karel Devriendt, Otto Sumray, and Giulio Zucal, we are organising the workshop in MPI-CBG, 22-25 Jun 2026.
Thanks to the support from Heather Harrington's group at CSBD, MPI!

Abstract ddl: 1 Mar 2026

More details follow 🧡

12.02.2026 16:07 πŸ‘ 8 πŸ” 5 πŸ’¬ 2 πŸ“Œ 0
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Network of the day:
Social networks of the WWII Greek resistance by the communist party youth league. From: attilabatorfy.substack.com/p/diagrams-o...

11.02.2026 20:34 πŸ‘ 10 πŸ” 2 πŸ’¬ 0 πŸ“Œ 0
Social Networks | ScienceDirect.com by Elsevier - Social Networks | ScienceDirect.com by Elsevier Read the latest articles of Social Networks at ScienceDirect.com, Elsevier’s leading platform of peer-reviewed scholarly literature

For the ABM and networks enthusiasts: Special Issue of Social Networks on "Agent-based Modelling for Social Network Research" - co-ed by Andreas Flache, @squazzoni.bsky.social, KΓ‘roly TakΓ‘cs and me

www.sciencedirect.com/special-issu...

Deadlines
Extended abstracts: 1 April
Full papers: 15 November

10.02.2026 11:04 πŸ‘ 11 πŸ” 11 πŸ’¬ 0 πŸ“Œ 0
Preview
Complex Systems Frameworks Collection Complex Systems Frameworks Collection Frameworks A-Z – Complex Systems Frameworks Collection

Complex Systems Frameworks Collection stream.syscoi.com/2026/02/09/c...

10.02.2026 08:05 πŸ‘ 1 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
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Network of the day: An "unpruned cyclic entailment mesh" by Gordon Pask, the networkiest of cyberneticians monoskop.org/log/?p=2369

09.02.2026 09:36 πŸ‘ 8 πŸ” 1 πŸ’¬ 0 πŸ“Œ 1

Gemini insists that every section heading should have a subheading (even subsection headings). Now I realize it learned that from Bouchaud.

08.02.2026 10:27 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

But did @nachristakis.bsky.social then take 24 minutes to read it?

02.02.2026 16:09 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

The Google office?

01.02.2026 20:00 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

A view from Shibuya Stream?

01.02.2026 19:45 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Yes!
If humans had a collective intelligence, it would probably have worked pretty much opposite to: a) coming up with words. b) discussing (and failing) to define these.

01.02.2026 16:53 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

It took two weeks from we paid the APC until we got the proofs, then another two weeks between returned proofs and publication. (This was half a year ago.)

28.01.2026 19:45 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
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Network of the day: US air mail routes 1928. (From: www.flickr.com/photos/13590... )

27.01.2026 12:32 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Preview
International Roundtable on Computational Social Science: Bedoor AlShebli "The science of science... and its human side" Welcome to the International Roundtable on Computational Social Science with Bedoor AlShebli, New York University (NYU) Abu Dhabi. The seminar is open to...

Join us on Thursday, 29 January, at *13:30 CET for the International Roundtable on Computational Social Science with
Bedoor AlShebli (NYU Abu Dhabi)

πŸ”Ή The Science of Science... and its Human Side πŸ”Ή More info: liu.se/en/event/int...

26.01.2026 09:38 πŸ‘ 6 πŸ” 3 πŸ’¬ 0 πŸ“Œ 0
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Aalto University is looking for an Assistant Professor in Computer Science, application deadline February 2, 2026!
www.aalto.fi/en/open-posi...

25.01.2026 11:04 πŸ‘ 10 πŸ” 9 πŸ’¬ 0 πŸ“Œ 2
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A true legend of the game up next in our colloquium series. On January 27, Mark Newman will talk about competition networks and hierarchies. Sign up here for a Zoom link iu.zoom.us/webinar/regi...

22.01.2026 13:44 πŸ‘ 5 πŸ” 3 πŸ’¬ 0 πŸ“Œ 0

I remember one of these blends make much better latte, but they are similar for americano . . weird

16.01.2026 13:43 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
The ENDOW project is seeking a Research Officer in Research Data Management to be based at the London School of Economics. 
- Oversee and extend our database covering geospatial, demographic, economic & social network data from 50+ communities in 30+ countries!
- Contribute to research on the dynamics of social and economic inequality!
- Join a stellar interdisciplinary team!
- funded by the ESRC and the NSF
[world map showing location of ENDOW communities; photos of some of the team members and some of the ENDOW communities showing their diversity

The ENDOW project is seeking a Research Officer in Research Data Management to be based at the London School of Economics. - Oversee and extend our database covering geospatial, demographic, economic & social network data from 50+ communities in 30+ countries! - Contribute to research on the dynamics of social and economic inequality! - Join a stellar interdisciplinary team! - funded by the ESRC and the NSF [world map showing location of ENDOW communities; photos of some of the team members and some of the ENDOW communities showing their diversity

Research Officer in Research Data Management
Salary from Β£43,277 to Β£48,220 pa inclusive of London allowance
Fixed-term appointment for 18 months
This research officer position is to work with Eleanor Power as part of the ongoing "ENDOW" project (Economic Networks and the Dynamics of Wealth Inequality), funded by the UKRI and US National Science Foundation. The research officer will be based in the Department of Methodology, a leading centre for research and education in social science research methods. While we expect this to be a full-time appointment, we are open to considering the possibility of a part-time appointment.
The post entails overseeing and extending the database of the "ENDOW" project, which includes data from over fifty communities around the world, comprising economic, demographic, and social network data characterising each community, its resident households, and the individuals within them. The research officer will be responsible for the expansion of this database to include longitudinal data from each community site, implementing a robust data infrastructure to manage and curate this information. The research officer will work closely with Dr Power and data contributors to ensure data quality, standardisation, and appropriate governance. They will contribute to core analyses of the ENDOW project and develop tools and resources that will be of wide utility for the collection, curation, and analysis of cross-cultural data. This role is central to building the data infrastructure that will enable meaningful, productive comparisons across these diverse field sites and will ultimately serve as a resource for the broader scientific community.
The successful candidate will:
Have a completed PhD, be close to completing a PhD, or have other research experience that demonstrates the capability to produce independent original research
Have experience with database design, data management and data governance
Have experience with programming in R or Python

Research Officer in Research Data Management Salary from Β£43,277 to Β£48,220 pa inclusive of London allowance Fixed-term appointment for 18 months This research officer position is to work with Eleanor Power as part of the ongoing "ENDOW" project (Economic Networks and the Dynamics of Wealth Inequality), funded by the UKRI and US National Science Foundation. The research officer will be based in the Department of Methodology, a leading centre for research and education in social science research methods. While we expect this to be a full-time appointment, we are open to considering the possibility of a part-time appointment. The post entails overseeing and extending the database of the "ENDOW" project, which includes data from over fifty communities around the world, comprising economic, demographic, and social network data characterising each community, its resident households, and the individuals within them. The research officer will be responsible for the expansion of this database to include longitudinal data from each community site, implementing a robust data infrastructure to manage and curate this information. The research officer will work closely with Dr Power and data contributors to ensure data quality, standardisation, and appropriate governance. They will contribute to core analyses of the ENDOW project and develop tools and resources that will be of wide utility for the collection, curation, and analysis of cross-cultural data. This role is central to building the data infrastructure that will enable meaningful, productive comparisons across these diverse field sites and will ultimately serve as a resource for the broader scientific community. The successful candidate will: Have a completed PhD, be close to completing a PhD, or have other research experience that demonstrates the capability to produce independent original research Have experience with database design, data management and data governance Have experience with programming in R or Python

🚨Job alert! The ENDOW project is hiring a Research Officer in Research Database Management, to be based at @lsemethodology.bsky.social.

Oversee & expand our database & contribute to research on social & economic inequality.

Deadline 15 February. Share & reach out!
jobs.lse.ac.uk/Vacancies/W/...

15.01.2026 11:13 πŸ‘ 19 πŸ” 28 πŸ’¬ 2 πŸ“Œ 1
A grid of images showing SocioPatterns wearable devices, collaborators of the project, proximity graphs, and deployments in museums, hospitals, villages.

A grid of images showing SocioPatterns wearable devices, collaborators of the project, proximity graphs, and deployments in museums, hospitals, villages.

Long overdue refresh of the SocioPatterns website! ✨ sociopatterns.org New content & datasets, and a chance to celebrate 17+ years of collabs, ~100 publications, 2000+ studies using our data. Thanks – more ahead! @alainbarrat.bsky.social @wouter-vdb.bsky.social @foolsdelight.bsky.social @isi.it

14.01.2026 13:37 πŸ‘ 22 πŸ” 17 πŸ’¬ 1 πŸ“Œ 1
The long dark in Vorkuta. Part 1.
The long dark in Vorkuta. Part 1. YouTube video by Ninurta

the mood 😳
youtu.be/PXpJs-myJIQ?...

13.01.2026 15:23 πŸ‘ 3 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0