Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Effect of Partisanship and Political Advertising on Close Family
  Ties   Research on growing American political polarization and antipathy primarily
studies public institutions and political processes, ignoring private effects
including strained family ties. Using anonymized smartphone-location data and
precinct-level voting, we show that Thanksgiving dinners attended by
opposing-party precinct residents were 30-50 minutes shorter than same-party
dinners. This decline from a mean of 257 minutes survives extensive spatial and
demographic controls. Dinner reductions in 2016 tripled for travelers from
media markets with heavy political advertising --- an effect not observed in
2015 --- implying a relationship to election-related behavior. Effects appear
asymmetric: while fewer Democratic-precinct residents traveled in 2016 than
2015, political differences shortened Thanksgiving dinners more among
Republican-precinct residents. Nationwide, 34 million person-hours of
cross-partisan Thanksgiving discourse were lost in 2016 to partisan effects.

37
The categories of this paper are: supr-con
20
The categories of this paper are: acc-phys
7
The categories of this paper are: hep-th
9
The categories of this paper are: nlin
32
The categories of this paper are: atom-ph
12
The categories of this paper are: nucl-th
29
The categories of this paper are: funct-an
36
The categories of this paper are: cmp-lg
26
The categories of this paper are: bayes-an
35
The categories of this paper are: mtrl-th
33
The categories of this paper are: plasm-ph
17
The categories of this paper are: q-fin
22
The categories of this paper are: chao-dyn
16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol
0
The categories of this paper are: hep-ph