Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Opium for the Poor Is Opium. Medicare Providers in States with Low
  Income Prescribe High Levels of Opiates   The majority of Medicare opioid prescriptions originate with family practice
and internal medicine providers.
  I show that the average number of Medicare opium prescriptions by these
providers vary strongly by state and that 54% of the variance is accounted for
by the state median household income. I also show that there is a very similar
relationship in opioid claims per capita and per Medicare recipient.
  In all cases Alabama is the state with the most claims and Hawaii is the
state with the least claims.

27
The categories of this paper are: comp-gas
26
The categories of this paper are: bayes-an
7
The categories of this paper are: hep-th
31
The categories of this paper are: ao-sci
24
The categories of this paper are: dg-ga
15
The categories of this paper are: nucl-ex
11
The categories of this paper are: hep-lat
8
The categories of this paper are: hep-ex
33
The categories of this paper are: plasm-ph
30
The categories of this paper are: q-alg
25
The categories of this paper are: patt-sol
13
The categories of this paper are: quant-ph
3
The categories of this paper are: physics
12
The categories of this paper are: nucl-th
14
The categories of this paper are: math-ph
32
The categories of this paper are: atom-ph