Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Global dynamics of GDP and trade   We use the logistic equation to model the dynamics of the GDP and the trade
of the six countries with the highest GDP in the world, namely, USA, China,
Japan, Germany, UK and India. From the modelling of the economic data, which
are made available by the World Bank, we predict the maximum values of the
growth of GDP and trade, as well as the duration over which exponential growth
can be sustained. We set up the correlated growth of GDP and trade as the phase
solutions of an autonomous second-order dynamical system. GDP and trade are
related to each other by a power law, whose exponent differentiates the six
national economies into two types. Under conducive conditions for economic
growth, our conclusions have general validity.

34
The categories of this paper are: chem-ph
8
The categories of this paper are: hep-ex
1
The categories of this paper are: cs
10
The categories of this paper are: q-bio
20
The categories of this paper are: acc-phys
37
The categories of this paper are: supr-con
26
The categories of this paper are: bayes-an
19
The categories of this paper are: eess
4
The categories of this paper are: cond-mat
31
The categories of this paper are: ao-sci
23
The categories of this paper are: solv-int
28
The categories of this paper are: alg-geom
11
The categories of this paper are: hep-lat
15
The categories of this paper are: nucl-ex
7
The categories of this paper are: hep-th
2
The categories of this paper are: math