Hicks’s fundamental goal become toassemble a dynamic principle, withinside the experience of a principle wherein ‘every variableought to be dated’. Static evaluation become handiest taken into consideration as a beneficial, aleven though fundamental,premiss for dynamic evaluation. The most important trouble withinside the shift from statics todynamics comes from the reality that, even as in a static context the choices ofthe marketers rely entirely on modern-day costs, in a dynamic context they additionallyrely on predicted costs. The device utilized by Hicks to make static evaluationserve dynamic ends become Myrdal’s and Lindahl’s ‘length’ technique, theeffectiveness of which he had already had the possibility of experimenting in1935. As we've got visible in Chapter 7, Myrdal had added expectancies amongstthe determinants of relative costs: destiny predicted modifications produce resultsat the monetary system earlier than they sincerely take area. This ends in the realitythat the dedication of an equilibrium ought to recall expectancies.Hicks later known as Myrdal’s technique the ‘expectancies technique’. On the oppositehand, as we additionally stated withinside the preceding bankruptcy, Lindahl had already openedthe manner for the evaluation of a dynamic system in phrases of a succession ofbrief equilibria.