“The writer, who as an engineer has spent most of his life in factories, is inclined to look at the basis for investment from a technological point of view… Consider … the class of industrial investments only… The situation is one of entrepreneurs and boards of directors considering, from time to time, various ’possibilities of investment’, such as extra lathes or looms, an extension to a factory, a venture in some completely new product, and so on. It is helpful to think of these ’opportunities for investment’ as existing, in a given situation, in great number and variety, whether they are at that moment under active consideration or not. When any such possibility is considered it is assessed in respect of ’expected profitability’. One may conveniently think of all possibilities of investment as ’quanta’ that can be placed in a schedule of small ranges of expected profitability according to these assessments. The placement of a given ’opportunity for investment’ on this schedule has some ’margin of uncertainty”

—  Arnold Tustin

a curious analogy with the case of the quanta of physics
Source: The Mechanism of Economic Systems (1953), p. 103; As cited in: Prices Revalued as Information: Circuit Elements, online document 2013

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Arnold Tustin18
British engineer 1899–1994

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