自90年代中期以来，信息技术和国特网的商业应用范围迅速扩大，与工业时代相比，产品成本及价格模式发生了很大变化。认真研究和借鉴这些变化，对我国企业适应信息时代的要束，提高产品价格决策的科学性和企业竞争力，具有很重要的现实意义。1边际成本降至很低。在工业时代，工 Since the mid-1990s, the scope of commercial application of information technology and Internet has rapidly expanded. Compared with the industrial age, the product cost and pricing model have undergone great changes. It is of great practical significance to study and draw lessons from these changes seriously, to keep the Chinese enterprises adapting to the information age, and to improve the scientific decision-making of products and the competitiveness of enterprises. 1 Marginal costs have dropped to very low levels. In the industrial age, workers