Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Acceptance Rates in Physical Review Letters: No Seasonal Bias   Are editorial decisions biased? A recent discussion in Learned Publishing has
focused on one aspect of potential bias in editorial decisions, namely seasonal
(e.g., monthly) variations in acceptance rates of research journals. In this
letter, we contribute to the discussion by analyzing data from Physical Review
Letters (PRL), a journal published by the American Physical Society. We studied
the 190,106 papers submitted to PRL from January 1990 until September 2012. No
statistically significant variations were found in the monthly acceptance
rates. We conclude that the time of year that the authors of a paper submit
their work to PRL has no effect on the fate of the paper through the review
process.

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The categories of this paper are: hep-ph
6
The categories of this paper are: astro-ph
15
The categories of this paper are: nucl-ex
13
The categories of this paper are: quant-ph
36
The categories of this paper are: cmp-lg
18
The categories of this paper are: econ
35
The categories of this paper are: mtrl-th
28
The categories of this paper are: alg-geom
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The categories of this paper are: ao-sci
19
The categories of this paper are: eess
37
The categories of this paper are: supr-con
20
The categories of this paper are: acc-phys
22
The categories of this paper are: chao-dyn
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The categories of this paper are: hep-th
21
The categories of this paper are: adap-org
14
The categories of this paper are: math-ph