Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Average group effect of strongly correlated predictor variables is
  estimable   It is well known that individual parameters of strongly correlated predictor
variables in a linear model cannot be accurately estimated by the least squares
regression due to multicollinearity generated by such variables. Surprisingly,
an average of these parameters can be extremely accurately estimated. We find
this average and briefly discuss its applications in the least squares
regression.

25
The categories of this paper are: patt-sol
13
The categories of this paper are: quant-ph
15
The categories of this paper are: nucl-ex
11
The categories of this paper are: hep-lat
1
The categories of this paper are: cs
22
The categories of this paper are: chao-dyn
10
The categories of this paper are: q-bio
0
The categories of this paper are: hep-ph
19
The categories of this paper are: eess
30
The categories of this paper are: q-alg
31
The categories of this paper are: ao-sci
24
The categories of this paper are: dg-ga
9
The categories of this paper are: nlin
26
The categories of this paper are: bayes-an
36
The categories of this paper are: cmp-lg
18
The categories of this paper are: econ