Abstract：Competitive edge refers to the competitive advantage over competitors. It consists of two, or three, or four factors according to different theories. The two factors refer to low cost and differentiation. The three factors are supply, demand and economy of scale. The four factors include efficiency, quality, customer response and creation. The sustainability of competitive edge is subject to such factors as industrial environment, enterprise maintenance and creation. Competitive edge keeps changing. It may be lost over time, so its sustainability is the key.
祖明. 竞争优势的内涵、构成要素及可持续性问题思考——以通用汽车为例[J]. 江苏大学学报（社会科学版）, 2010, 12(2): 85-88.
Zu Ming . On the Connotation, Components and Sustainability of Competitive Edge --A Case Study of General Motor. Journal of Jiangsu University（Social Science Editi, 2010, 12(2): 85-88.
2010, Vol. 12 
