Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Modeling Website Visits   We propose a multivariate model for the number of hits on a set of popular
websites, and show it to accurately reflect the behavior recorded in a data set
of Internet users in the United States. We assume that the random vector of
visits is distributed according to a censored multivariate normal with
marginals transformed to be discrete Pareto IV and, following the ideas of
Gaussian graphical models, we enforce sparsity on the inverse covariance matrix
to reduce dimensionality and to visualize the dependence structure as a graph.
The model allows for an easy inclusion of covariates and is useful for
comprehending the behavior of Internet users as a function of their age and
gender.

7
The categories of this paper are: hep-th
4
The categories of this paper are: cond-mat
0
The categories of this paper are: hep-ph
18
The categories of this paper are: econ
6
The categories of this paper are: astro-ph
13
The categories of this paper are: quant-ph
29
The categories of this paper are: funct-an
20
The categories of this paper are: acc-phys
15
The categories of this paper are: nucl-ex
35
The categories of this paper are: mtrl-th
37
The categories of this paper are: supr-con
23
The categories of this paper are: solv-int
21
The categories of this paper are: adap-org
28
The categories of this paper are: alg-geom
14
The categories of this paper are: math-ph
17
The categories of this paper are: q-fin