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qa_user — User interactions on Q&A websites (2016, 2024)

Description

Temporal networks of interactions among users of four question-and-answer websites of the Stack Exchange network: Stack Overflow (programming), Math Overflow (research mathematics), Super User (computer use) and Ask Ubuntu (the Ubuntu operating system). The networks were constructed by A. Paranjape, A. R. Benson and J. Leskovec from the public Stack Exchange data dump, and span from the creation of each site (2008 or 2009) until March 2016. Nodes are users, and a directed edge $(i,j)$ with timestamp $t$ indicates that user $i$ responded to a post of user $j$ at time $t$, in one of three ways:

  • a2q: user $i$ answered user $j$'s question;
  • c2q: user $i$ commented on user $j$'s question;
  • c2a: user $i$ commented on user $j$'s answer;

and all is the union of the three types. Each network is named after the site and the type of interaction, as in mathoverflow_a2q. Each interaction is a separate edge, so pairs of users can be connected by many parallel edges, and the networks contain self-loops, e.g. when users comment on their own posts.

The networks named with 2024, as in mathoverflow_2024_a2q, were constructed in the same way from the Stack Exchange data dump of April 2024 (the last one published on the Internet Archive), and span from the creation of each site until early April 2024. They contain the questions, answers and comments of the dump whose authors (and the authors of the posts they respond to) are given; the posts and comments of deleted user accounts, which the dump gives without author, are left out, as are those of the automated "Community" account (user id -1), which the 2016 networks do not contain either. In the all networks, the interactions are sorted by time.

The networks have the following properties:

  • (Node) vid: the user ID from the source data.
  • (Edge) timestamp: the time of the interaction (Unix time, in seconds).
Tags
Social Online Unweighted Timestamps
Added
2020-08-11
Citation
  • A. Paranjape, A. R. Benson, & J. Leskovec, "Motifs in Temporal Networks". In Proceedings of the Tenth ACM International Conference on Web Search and Data Mining (WSDM ’17). Association for Computing Machinery, New York, NY, USA, 601–610. (2017) 10.1145/3018661.3018731 Sci-Hub
  • Stack Exchange, Inc., "Stack Exchange Data Dump - 2024-04-02." archive.org
Upstream URL OK
https://snap.stanford.edu/data/sx-stackoverflow.html
https://snap.stanford.edu/data/sx-mathoverflow.html
https://snap.stanford.edu/data/sx-superuser.html
https://snap.stanford.edu/data/sx-askubuntu.html
https://archive.org/details/stackexchange
Upstream license
Creative Commons Attribution-ShareAlike 4.0 (CC BY-SA 4.0), https://creativecommons.org/licenses/by-sa/4.0/
Networks
Tip: click on a column header to sort the list, or hover over it for a description.
Column legend
$\left<k\right>$
Mean degree
$\sigma_k$
Standard deviation of the degrees
$\lambda_h$
Largest eigenvalue of the Hashimoto (non-backtracking) matrix
$\tau$
Random walk mixing time
$r$
Degree assortativity
$c$
Global clustering coefficient
$\oslash$
(Pseudo-) diameter
$S$
Relative size of the largest component
NPs
Node properties
EPs
Edge properties
Name Nodes Edges $\left<k\right>$ $\sigma_k$ $\lambda_h$ $\tau$ $r$ $c$ $\oslash$ $S$ Kind Mode NPs EPs gt GraphML GML csv
stackoverflow_all 2,601,977 63,497,050 24.40 436.50 713.99 47.91 0.25 0.04 11 0.99 Directed Unipartite vid timestamp 361.8 MiB 469.2 MiB 457.8 MiB 476.3 MiB
stackoverflow_a2q 2,464,606 17,823,525 7.23 89.84 350.01 28.47 -0.03 0.01 13 0.98 Directed Unipartite vid timestamp 123.5 MiB 153.2 MiB 151.2 MiB 167.1 MiB
stackoverflow_c2q 1,655,353 20,268,151 12.24 159.43 287.15 95.34 -0.05 0.00 12 0.98 Directed Unipartite vid timestamp 113.7 MiB 143.9 MiB 140.6 MiB 152.4 MiB
stackoverflow_c2a 1,646,338 25,405,374 15.43 309.58 457.47 146.59 0.44 0.07 16 0.99 Directed Unipartite vid timestamp 132.9 MiB 177.9 MiB 172.4 MiB 181.3 MiB
mathoverflow_all 24,818 506,550 20.41 232.49 195.43 21.78 0.22 0.23 9 0.99 Directed Unipartite vid timestamp 2.8 MiB 3.9 MiB 3.9 MiB 3.8 MiB
mathoverflow_a2q 21,688 107,581 4.96 44.54 97.34 17.64 -0.01 0.10 10 0.98 Directed Unipartite vid timestamp 906 KiB 1.3 MiB 1.2 MiB 1.2 MiB
mathoverflow_c2q 16,836 203,639 12.10 103.18 108.45 25.73 0.16 0.11 8 0.99 Directed Unipartite vid timestamp 1.2 MiB 1.7 MiB 1.6 MiB 1.6 MiB
mathoverflow_c2a 13,840 195,330 14.11 154.24 124.97 25.31 0.38 0.26 9 0.98 Directed Unipartite vid timestamp 1.1 MiB 1.6 MiB 1.5 MiB 1.5 MiB
superuser_all 194,085 1,443,339 7.44 152.37 202.37 78.00 0.07 0.03 12 0.97 Directed Unipartite vid timestamp 10.1 MiB 14.3 MiB 14.1 MiB 13.9 MiB
superuser_a2q 167,981 430,033 2.56 30.92 97.67 181.22 -0.05 0.01 14 0.92 Directed Unipartite vid timestamp 5.0 MiB 6.9 MiB 6.9 MiB 6.6 MiB
superuser_c2q 94,548 479,067 5.07 97.01 94.65 49.23 -0.06 0.00 13 0.96 Directed Unipartite vid timestamp 3.8 MiB 5.2 MiB 5.1 MiB 5.0 MiB
superuser_c2a 101,052 534,239 5.29 102.53 131.69 102.81 0.40 0.07 13 0.94 Directed Unipartite vid timestamp 4.1 MiB 5.8 MiB 5.7 MiB 5.5 MiB
askubuntu_all 159,316 964,437 6.05 119.11 151.60 73.09 0.15 0.04 13 0.96 Directed Unipartite vid timestamp 7.2 MiB 10.1 MiB 10.0 MiB 9.6 MiB
askubuntu_a2q 137,517 280,102 2.04 25.51 75.70 60.15 -0.02 0.02 15 0.88 Directed Unipartite vid timestamp 3.7 MiB 5.0 MiB 5.0 MiB 4.8 MiB
askubuntu_c2q 79,155 327,513 4.14 55.61 68.44 46.13 -0.11 0.01 13 0.94 Directed Unipartite vid timestamp 2.8 MiB 3.8 MiB 3.8 MiB 3.6 MiB
askubuntu_c2a 75,555 356,822 4.72 88.34 99.08 66.60 0.38 0.07 13 0.93 Directed Unipartite vid timestamp 2.8 MiB 4.0 MiB 3.9 MiB 3.7 MiB
stackoverflow_2024_all — — — — — — — — — — N/A N/A N/A N/A
stackoverflow_2024_a2q — — — — — — — — — — N/A N/A N/A N/A
stackoverflow_2024_c2q — — — — — — — — — — N/A N/A N/A N/A
stackoverflow_2024_c2a — — — — — — — — — — N/A N/A N/A N/A
mathoverflow_2024_all — — — — — — — — — — N/A N/A N/A N/A
mathoverflow_2024_a2q — — — — — — — — — — N/A N/A N/A N/A
mathoverflow_2024_c2q — — — — — — — — — — N/A N/A N/A N/A
mathoverflow_2024_c2a — — — — — — — — — — N/A N/A N/A N/A
superuser_2024_all — — — — — — — — — — N/A N/A N/A N/A
superuser_2024_a2q — — — — — — — — — — N/A N/A N/A N/A
superuser_2024_c2q — — — — — — — — — — N/A N/A N/A N/A
superuser_2024_c2a — — — — — — — — — — N/A N/A N/A N/A
askubuntu_2024_all — — — — — — — — — — N/A N/A N/A N/A
askubuntu_2024_a2q — — — — — — — — — — N/A N/A N/A N/A
askubuntu_2024_c2q — — — — — — — — — — N/A N/A N/A N/A
askubuntu_2024_c2a — — — — — — — — — — N/A N/A N/A N/A