Correlations are not explanations and besides, they can be as spurious as the high correlation in Finland between foxes killed and divorces. - Gunnar Myrdal

It is good proof of Keynes’ intuitive genius that he reaches practical results that in many respects are very much superior to his deficient statements of certain theoretical problems.

For these anticipations determine the behaviour of the economic subjects and consequently those changes in the whole price system which during a period actually occur as a result of the actions of individuals.

Some of these quantities refer directly to a point of time. That is true of "capital value" as also of such quantities as demand and supply prices. Other terms – as e.g. "income", "revenue", "return", "expenses", "savings", "investments" – imply, however, a time period for which they are reckoned. But in order to be unambiguous they must also refer to a point of time at which they are calculated.