In his Chapter 2 Goodspeed compares Keynes's Treatise on Money ( 1950) with Hayek's Prices and Production( 1967). Here, establishing a Wicksell connection is fairly straightforward. But so too, I would contend, is identifying the critical Keynes-Hayek disconnect. Keynes explicitly recognizes that his "Fundamental Equations" give play to a possible Wicksellian divergence between saving and investment. As quoted by Goodspeed (p. 50), "In substance and intention, Wicksell's theory is closely akin ... to the theory in this Treatise." But, assuming full employment and lacking an underlying theory of capital, Keynes could conceive of an equilibrating process (bringing saving and investment into alignment) only in terms of adjustments in his equations' two price levels (pertaining to consumption goods and investment goods).
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Subject: History of Economic Thought; Methodology