Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: First Order Approximations of the Pythagorean Won-Loss Formula for
  Predicting MLB Teams' Winning Percentages   We mathematically prove that an existing linear predictor of baseball teams'
winning percentages (Jones and Tappin 2005) is simply just a first-order
approximation to Bill James' Pythagorean Won-Loss formula and can thus be
written in terms of the formula's well-known exponent. We estimate the linear
model on twenty seasons of Major League Baseball data and are able to verify
that the resulting coefficient estimate, with 95% confidence, is virtually
identical to the empirically accepted value of 1.82. Our work thus helps
explain why this simple and elegant model is such a strong linear predictor.

31
The categories of this paper are: ao-sci
21
The categories of this paper are: adap-org
15
The categories of this paper are: nucl-ex
19
The categories of this paper are: eess
30
The categories of this paper are: q-alg
28
The categories of this paper are: alg-geom
7
The categories of this paper are: hep-th
33
The categories of this paper are: plasm-ph
6
The categories of this paper are: astro-ph
0
The categories of this paper are: hep-ph
4
The categories of this paper are: cond-mat
32
The categories of this paper are: atom-ph
11
The categories of this paper are: hep-lat
36
The categories of this paper are: cmp-lg
22
The categories of this paper are: chao-dyn
24
The categories of this paper are: dg-ga