Stack Exchange — mathoverflow.net
A Stack Exchange (mathoverflow.net) dataset of 36,520 users, 142,188 answer-collaboration edges, 152,893 questions, 186,840 answers, collected by Stack Exchange, Inc. via the annual Stack Exchange Data Dump. Each record contains user nodes (reputation, badge counts, vote history), directed weighted edges (answerer→asker, weight=answer score, count=interactions, accepted=bool), post text, tag distribution. User collaboration network from mathoverflow.net — directed weighted graph where edges represent knowledge-sharing relationships (A answered B's question), with edge weight reflecting answer quality. Enables prestige hierarchy, community detection, and expertise flow analysis.. Suitable for expertise network analysis, reputation systems, community detection, knowledge flow, PageRank-based authority ranking, Q&A platform dynamics..
Cite this dataset at
stackexchange-mathoverflow-net.echo.directory
Analytics
The full graph has 36,520 nodes; this view shows the 1,000-node sample the pipeline drew for display. Node size is centrality, colour is community.
Topic 0
Topic 1
Topic 2
Topic 3
Topic 4
Topic 5
Topic 6
Topic 7
Topic 8
Topic 9
Topic 10
Topic 11
Show all 19 topics
Topic 12
Topic 13
Topic 14
Topic 15
Topic 16
Topic 17
Topic 18
Sampled: text metrics from 50K of 1.3M records; topic model from 20K.
Record
- Catalog key
stackexchange-mathoverflow-net- Authors
- Stack Exchange, Inc.
- Year
- 2025
- Source paper
- Stack Exchange Data Dump
- License
- CC BY-SA 2.5 / 3.0 / 4.0 (by post date) (CC-BY-SA-2.5 AND CC-BY-SA-3.0 AND CC-BY-SA-4.0)
- Records
- 1,310,835
- Nodes
- 36,520
- Edges
- 142,188 (directed)
- Nodes are
- user (Stack Exchange account)
- Edges are
- answer collaboration (A answered B's question)
- Attributes
- nodes have attributes; edges have attributes
- Text corpus
- question titles, post bodies, comment text, tag names
- Languages
- en
- Collected
- 2009/2024 (2000s, 2010s, 2020s)
- Tasks
- From the graph: link prediction, community detection
- Region
- Global (inferred: the platform is used worldwide)
Provenance
- Originally published at
- https://archive.org/download/stackexchange link checked
- Hosted copy
- Mirrored on echo.directory on 2026-10-09, 486.8 MB across 1 files. Checksums in MANIFEST.json.
How to cite
BibTeX
@misc{echo2026,
title = {ECHO: Exploratory Compendium of Humanity Online},
author = {Switzer, Braden and Zafarani, Reza},
year = {2026},
url = {https://echo.directory},
note = {Syracuse University}
}
@misc{stackexchange_2025,
title = {Stack Exchange Data Dump},
author = {{Stack Exchange, Inc.}},
year = {2025},
publisher = {Internet Archive},
url = {https://archive.org/download/stackexchange}
} APA
Switzer, B., & Zafarani, R. (2026). ECHO: Exploratory Compendium of Humanity Online [Data repository]. Syracuse University. https://echo.directory
Stack Exchange, Inc. (2025). Stack Exchange — mathoverflow.net [Data set]. https://stackexchange-mathoverflow-net.echo.directory/
MLA
Switzer, Braden, and Reza Zafarani. ECHO: Exploratory Compendium of Humanity Online. Syracuse University, 2026, echo.directory.
Stack Exchange, Inc. Stack Exchange — mathoverflow.net. 2025, stackexchange-mathoverflow-net.echo.directory/.