Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: An Integer Programming Formulation Applied to Optimum Allocation in
  Multivariate Stratified Sampling   The problem of optimal allocation of samples in surveys using a stratified
sampling plan was first discussed by Neyman in 1934. Since then, many
researchers have studied the problem of the sample allocation in multivariate
surveys and several methods have been proposed. Basically, these methods are
divided into two class: The first involves forming a weighted average of the
stratum variances and finding the optimal allocation for the average variance.
The second class is associated with methods that require that an acceptable
coefficient of variation for each of the variables on which the allocation is
to be done. Particularly, this paper proposes a new optimization approach to
the second problem. This approach is based on an integer programming
formulation. Several experiments showed that the proposed approach is efficient
way to solve this problem, considering a comparison of this approach with the
other approach from the literature.

10
The categories of this paper are: q-bio
2
The categories of this paper are: math
6
The categories of this paper are: astro-ph
29
The categories of this paper are: funct-an
7
The categories of this paper are: hep-th
27
The categories of this paper are: comp-gas
15
The categories of this paper are: nucl-ex
4
The categories of this paper are: cond-mat
24
The categories of this paper are: dg-ga
33
The categories of this paper are: plasm-ph
32
The categories of this paper are: atom-ph
9
The categories of this paper are: nlin
28
The categories of this paper are: alg-geom
26
The categories of this paper are: bayes-an
0
The categories of this paper are: hep-ph
35
The categories of this paper are: mtrl-th