Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Synchronization analysis between exchange rates based on purchasing
  power parity using the Hilbert transform   Synchronization is a phenomenon when a pair of fluctuations adjust their
rhythms when they interact with each other. We measure the degree of
synchronization between the exchange rates of the U.S. dollar (USD) and the
euro, and between those of the USD and the Japanese yen based on purchasing
power parity (PPP) over time. We employ a method of synchronization analysis
using the Hilbert transform which is common in the field of nonlinear science.
We find that the synchronization degree is high most of the time, suggesting a
PPP establishment. The synchronization degree does not remain high across
periods containing economic events with asymmetric effects, such as the U.S.
real estate bubble.

10
The categories of this paper are: q-bio
33
The categories of this paper are: plasm-ph
20
The categories of this paper are: acc-phys
9
The categories of this paper are: nlin
32
The categories of this paper are: atom-ph
15
The categories of this paper are: nucl-ex
5
The categories of this paper are: gr-qc
35
The categories of this paper are: mtrl-th
0
The categories of this paper are: hep-ph
13
The categories of this paper are: quant-ph
34
The categories of this paper are: chem-ph
21
The categories of this paper are: adap-org
1
The categories of this paper are: cs
26
The categories of this paper are: bayes-an
17
The categories of this paper are: q-fin
12
The categories of this paper are: nucl-th