Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Characterizing Individual Communication Patterns   The increasing availability of electronic communication data, such as that
arising from e-mail exchange, presents social and information scientists with
new possibilities for characterizing individual behavior and, by extension,
identifying latent structure in human populations. Here, we propose a model of
individual e-mail communication that is sufficiently rich to capture meaningful
variability across individuals, while remaining simple enough to be
interpretable. We show that the model, a cascading non-homogeneous Poisson
process, can be formulated as a double-chain hidden Markov model, allowing us
to use an efficient inference algorithm to estimate the model parameters from
observed data. We then apply this model to two e-mail data sets consisting of
404 and 6,164 users, respectively, that were collected from two universities in
different countries and years. We find that the resulting best-estimate
parameter distributions for both data sets are surprisingly similar, indicating
that at least some features of communication dynamics generalize beyond
specific contexts. We also find that variability of individual behavior over
time is significantly less than variability across the population, suggesting
that individuals can be classified into persistent "types". We conclude that
communication patterns may prove useful as an additional class of attribute
data, complementing demographic and network data, for user classification and
outlier detection--a point that we illustrate with an interpretable clustering
of users based on their inferred model parameters.

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The categories of this paper are: atom-ph
26
The categories of this paper are: bayes-an
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The categories of this paper are: mtrl-th
25
The categories of this paper are: patt-sol
5
The categories of this paper are: gr-qc
37
The categories of this paper are: supr-con
2
The categories of this paper are: math
21
The categories of this paper are: adap-org
30
The categories of this paper are: q-alg
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The categories of this paper are: hep-ex
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The categories of this paper are: math-ph
7
The categories of this paper are: hep-th
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The categories of this paper are: plasm-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: alg-geom