The important data of economics are in the form of time series;
therefore, the statistical methods used will have to be those designed
for time series data. New methods for analyzing series containing no
trends have been developed by communication engineering, and much recent
research has been devoted to adapting and extending these methods so
that they will be suitable for use with economic series. This book
presents the important results of this research and further advances the
application of the recently developed Theory of Spectra to economics. In
particular, Professor Hatanaka demonstrates the new technique in
treating two problems-business cycle indicators, and the acceleration
principle existing in department store data.
Originally published in 1964.
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