Irving Fisher,
The Purchasing Power of Money…
“ Each time a pile has risen, the average level of all has fallen.VIII.75 The proposition that a general increase in demand, resulting in an increase in trade, tends to decrease and and not to increase the general level of prices, may be regarded as a sort of pons asinorum to test one's knowledge of the fundamental distinction between those influences affecting the general price level and those affecting the rise and fall of a particular price with respect to that level. ”
