But the research of sales response function stays at static model based on certain factor. The research is lack of further analysis of uncertain competitive factors, so its application is limited.

但销售反应函数的研究仍徘徊在基于可见确定因素的静态模型中，缺少对不确定竞争因素的进一步分析，使它的应用受到了限制。

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But the research of sales response function stays at static model based on certain factor. The research is lack of further analysis of uncertain competitive factors, so its application is limited.

但销售反应函数的研究仍徘徊在基于可见确定因素的静态模型中，缺少对不确定竞争因素的进一步分析，使它的应用受到了限制。

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