It's good to know how much economics there is...??????

Because there is no firm predictive use for it. Economics is based almost entirely on experiences, personal and historical.

Erik Grimmer-Solem has written:

'The rise of historical economics and social reform in Germany, 1864-1894' -- subject(s): Economic conditions, Historical school of economics

In the past (probably before the 19th Century), the study of economics is often referred to as "political economy". It is just a historical term and is rarely used today.

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