Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Global and country-specific mainstreaminess measures: Definitions,
  analysis, and usage for improving personalized music recommendation systems   Popularity-based approaches are widely adopted in music recommendation
systems, both in industry and research. However, as the popularity distribution
of music items typically is a long-tail distribution, popularity-based
approaches to music recommendation fall short in satisfying listeners that have
specialized music. The contribution of this article is three-fold. We provide
several quantitative measures describing the proximity of a user's music
preference to the music mainstream. We define the measures at two levels:
relating a listener's music preferences to the global music preferences of all
users, or relating them to music preferences of the user's country. Moreover,
we adopt a distribution-based and a rank-based approach as means to decrease
bias towards the head of the long-tail distribution. We analyze differences
between countries in terms of their level of mainstreaminess, uncover both
positive and negative outliers (substantially higher and lower country-specific
popularity, respectively, compared to the global mainstream), and investigate
differences between countries in terms of listening preferences related to
popular music artists. We use the standardized LFM-1b dataset, from which we
analyze about 8 million listening events shared by about 53,000 users (from 47
countries) of the music streaming platform Last.fm. We show that there are
substantial country-specific differences in listeners' music consumption
behavior with respect to the most popular artists listened to. We conduct
rating prediction experiments in which we tailor recommendations to a user's
level of preference for the music mainstream using the proposed 6
mainstreaminess measures. Results suggest that, in terms of rating prediction
accuracy, each of the presented mainstreaminess definitions has its merits.

27
The categories of this paper are: comp-gas
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
15
The categories of this paper are: nucl-ex
23
The categories of this paper are: solv-int
2
The categories of this paper are: math
22
The categories of this paper are: chao-dyn
9
The categories of this paper are: nlin
29
The categories of this paper are: funct-an
16
The categories of this paper are: stat
18
The categories of this paper are: econ
10
The categories of this paper are: q-bio
17
The categories of this paper are: q-fin
32
The categories of this paper are: atom-ph
28
The categories of this paper are: alg-geom
8
The categories of this paper are: hep-ex