产品绿色认证模型的扩展研究

Extension research on green certification model of product

对Vertinsky的绿色认证模型的假设条件进行了扩充.假设有形质量的生产成本与产品的无形质量(环境友好性)表现为负相关关系.由此得出结论,如果两厂商可自由选择产品的环境质量认证水平,则总质量高的产品的环境质量水平也高.如果两厂商必须通过政府规定的环境质量认证,则产品总质量高的厂商选择通过高质量的环境认证,而产品总质量低的厂商选择通过低质量的环境认证.与帕累托最优时相比,厂商自由选择环境认证水平时产品的环境质量相对低下.但在两个厂商都通过认证的前提下,不能确定单一水平认证和两个水平认证究竟谁更优.

The hypothesis conditions of green certification model of Vertinsky are extended： assume the production cost of observable quality is negatively correlated to unobservable quality level （environmental friendliness）. Main conclusion is, if two firms can freely choose quality level of certification, the firm with high total-quality product should choose to supply high environmental quality; if both firms have to certify their products in terms of government rule, it is socially optimal to let the firm with high total-quality product obtain a high environmental quality certification, however it is uncertain whether one certification level or two different certification levels are socially optimal when both firms certify their products.