集聚度能够反映行业的区域竞争优势.利用区位熵指数的方法对西安市2007-2009年7个现代服务业集聚区的集聚度进行测算,结果表明:最近3年西安市7个现代服务业集聚区都出现明显的产业集聚特征,其中区域性的会展中心、高新中央商务区、盛唐文化曲江新区的产业集聚度较高,集聚度增长趋势明显,发展状况良好;专业化特色大市场、商贸集聚区的专业化程度和竞争力水平略高于西安市同类产业的平均发展速度,但集聚度增长幅度不大,需扩大发展规模;现代物流产业集聚区和新北城商务中心的产业集聚度较低,需加大投资力度.%Concentrated degree can reflect the regional competitive advantage of the industries, the page measured and calculated the concentrated degrees of the seven modern service industries concentrated areas in Xi'an from 2007 to 2009 using the location entropy index. The results showed that: the last 3 years, the 7 areas in Xi'an have obvious industrial centralize features , and thereinto the regional convention center, high -tech central business districts, Shengtang Cultural new district in Qujiang showed higher industrial concentrated degree, and the growth trend of the industrial concentrated degree was clearly, these areas were developing in good condition; The specialization and competition level of the big specialized features markets, business concentration areas were slighfiy higher than the average growth rate of the same industries in Xi'an, but the growth rate of concentrated degree is not enough and also need to expand the development scale;The concentrated degree of the modem logistics concentrated areas and the new north city business centre is low, and need to increase investment for these areas.
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