中文摘要：

销售季节性商品的零售企业在销售季节开始前通常仅能获得有限的市场信息,在销售过程中因滞销而产生剩余库存的现象十分普遍.因此,许多零售企业会将商品在一级市场销售之后以折扣价格在二级市场上继续销售.为此,建立了这一问题的两阶段模型,在较宽松的需求假设下分析了模型所具有的性质,通过求解得到了零售企业对季节性商品的订货量决策和商品在两级市场间转换时刻决策所要满足的最优条件.

英文摘要：

In retail operations, retailers usually have limited access to market information before the start of the selling season. The inventory that ends up as unsold in primary markets can be significant. Thus, retailers look for strategies such as selling in the secondary markets at a discounted price. In this paper, we formulate a two-stage model for this problem and analyze the properties of the model under a more relaxed demand as- sumption. Finally, we derive optimality conditions for the retailers＇ ordering quantity decision and switching timing decision of seasonal goods.