关于“成本分析模型”的讨论

目前国内最常见的一种确定最佳现金持有量的分析模式存在着一个基本错误，即它将短缺成本看成与现金持有量呈线性关系，从而导致了一些错误的结论．在证明了上述错误的同时，指出短缺成本对现金持有量来说应该是一个随机事件．提出将公司现金持有量的多少看成是一个Wiener过程，并以此为前提，导出了公司最佳现金持有量的分析模型．

A Discussion on the Cost Analysis Model

It is found that there exists a mistake in the most commonly used analysis model now in china for the determination of the optimal amount of cash on hand. In the model, the shortage cost is assumed as a linear function of the amount of cash on hand and some wrong conclusions are then drawn. Why the conclusions are wrong is proved, and it is pointed out that the shortage cost with respect to the amount of cash on hand should be a stochastic event and the amount of cash held by a company can be viewed as a Wiener process. Based on this assumption, a new analysis model for determining the optimal amount of cash on hand is proposed.