If the rate of interest were to rise pari passu with the marginal efficiency of capital, there would be no stimulating effect from the expectation of rising prices.
如果利率与资本的边际效率同等上升,那么物价上涨的预期就不会产生刺激作用。
就业、利息和货币通论(上)
This simple principle leads, it will be seen, to the same conclusion as before, namely, that employment can only increase pari passu with an increase in investment; unless, indeed, there is a change in the propensity to consume.
(i) Some part of the maintenance of the equipment must necessarily take place pari passu with the act of using it (e.g. oiling the machine). The expense of this (apart from outside purchases) is included in the factor cost.