Economic Definition of investment demand curve. Defined.
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Term investment demand curve Definition: A graphical depiction of the negative relation between investment expenditures and the interest rate, based on the marginal efficiency of investment for different capital investment projects. This curve is derived by plotting, from high to low, the marginal efficiency of investment for all possible capital investment projects. Because firms select those projects with returns greater than the interest rate on financial capital, this marginal efficiency of investment curve traces out the investment demand curve.