Petruzzi and Dada (1999) used this price-demand relationship in several ways while presenting a single-period approach that maximized expected profit and established theorems that indicated how to select the stocking policy based on the statistical distribution that conferred the demand its stochastic nature. Such demand was presented in the form of an additive and in the form of a multiplicative model. Moreover, they presented a closed, analytical expression to determine the optimal price as a function of such stocking policy and compared it to the so-called riskless price as done by Mills (1959)