knowledge, Innis drew on several fields of study, including economics, history, communications and technology.

Economics and the price system

In his 1938 essay, The Penetrative Powers of the Price System, Innis anticipates his later concept of monopolies of knowledge. Although he does not precisely define what he means by the "price system", he does show how trade and technology shaped modern industrial economies. Innis suggests, for example, that the shift from coal and iron to oil and electricity had profound implications

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