Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Identifying Competition and Mutualism Between Online Groups   Platforms often host multiple online groups with overlapping topics and
members. How can researchers and designers understand how related groups affect
each other? Inspired by population ecology, prior research in social computing
and human-computer interaction has studied related groups by correlating group
size with degrees of overlap in content and membership, but has produced
puzzling results: overlap is associated with competition in some contexts but
with mutualism in others. We suggest that this inconsistency results from
aggregating intergroup relationships into an overall environmental effect that
obscures the diversity of competition and mutualism among related groups.
Drawing on the framework of community ecology, we introduce a time-series
method for inferring competition and mutualism. We then use this framework to
inform a large-scale analysis of clusters of subreddits that all have high user
overlap. We find that mutualism is more common than competition.

21
The categories of this paper are: adap-org
12
The categories of this paper are: nucl-th
18
The categories of this paper are: econ
4
The categories of this paper are: cond-mat
11
The categories of this paper are: hep-lat
20
The categories of this paper are: acc-phys
19
The categories of this paper are: eess
17
The categories of this paper are: q-fin
31
The categories of this paper are: ao-sci
3
The categories of this paper are: physics
2
The categories of this paper are: math
28
The categories of this paper are: alg-geom
29
The categories of this paper are: funct-an
36
The categories of this paper are: cmp-lg
35
The categories of this paper are: mtrl-th
8
The categories of this paper are: hep-ex