 This proportion can be found by modelling continuous growth on the physical (or material) level in opposition to the monetary level.In the equations above a general, for all branches, equal rate of profit was computed given


whereby a price had to be arbitrarily determined as numéraire.In this case the price formula_13 for the consumption good formula_2 was set equal to 1 (numéraire) and the price for the investment good formula_1 was then computed.