Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Generalised central limit theorems for growth rate distribution of
  complex systems   We introduce a solvable model of randomly growing systems consisting of many
independent subunits. Scaling relations and growth rate distributions in the
limit of infinite subunits are analysed theoretically. Various types of scaling
properties and distributions reported for growth rates of complex systems in a
variety of fields can be derived from this basic physical model. Statistical
data of growth rates for about 1 million business firms are analysed as a
real-world example of randomly growing systems. Not only are the scaling
relations consistent with the theoretical solution, but the entire functional
form of the growth rate distribution is fitted with a theoretical distribution
that has a power-law tail.

12
The categories of this paper are: nucl-th
28
The categories of this paper are: alg-geom
9
The categories of this paper are: nlin
21
The categories of this paper are: adap-org
14
The categories of this paper are: math-ph
33
The categories of this paper are: plasm-ph
22
The categories of this paper are: chao-dyn
7
The categories of this paper are: hep-th
32
The categories of this paper are: atom-ph
18
The categories of this paper are: econ
8
The categories of this paper are: hep-ex
20
The categories of this paper are: acc-phys
24
The categories of this paper are: dg-ga
27
The categories of this paper are: comp-gas
0
The categories of this paper are: hep-ph
31
The categories of this paper are: ao-sci