摘要
In this paper, we study a single-period two-product inventory model with stochastic demands and downward substitution. The optimal order quantities are presented and some properties are provided. Comparing with newsboy model, we prove that both the profit and the fill rate can be improved by using the substitution policy.
基金
This work was supported partly by NSFC/RGC Joint Research Program under grant 79910161987
the National Science Foundation of China(79825102,70231010,7032 1001)