Who amongst the following economists imparted money demand of a portfolio theory approach ? (1) J.M.…

Tobin’s risky-asset nd Friedman’s wealth/asset-demand framework are the portfolio approaches in this comparison. Baumol is the transactions-inventory model; Keynes’s elementary speculative choice is not the diversified risk-portfolio model intended. Thus 3,4; broader historical use of portfolio is qualified in the explanation. 3, 4 : Correct in the comparison explained above.