企业集群现象引起了国内外经济与管理学界的高度重视。本文首先介绍一种评价企业集群竞争力的基础-企业-市场（Groundings-Enterprises-Markets，GEM）模型，然后应用此模型对广东省狮岭皮具企业集群进行了评价，最后对评价结果做了分析。

Other than co-operation, competition is a central issue in industry and commerce today, which always exists among enterprises that provide homogeneous products or services. The competitive relationships of enterprises determine the rivalry nature of dominant interactions among them; that is, rivalry actions are the main interactions while co-operation actions generally occur on an occasional basis and do not essentially change this competitive nature of their relationships. This paper reports a detailed study of a competitive relationship network of 578 certified Independent Software Vendors (ISVs) in Guangzhou city, China, which shows some prominent scale-free (SF) structural properties and complex dynamical behaviors. In this report, the economic background and the significance the competitive relationship network model will be described; the underlying dynamical mechanism of the network model will be analyzed, showing some advantages of the new model for industrial organization theory (IO) over the traditional ones. Finally, some related issues, such as the static properties of the competitive relationship network and some of its graph properties, will be discussed.