以关天经济区的8个市(区)为研究对象,构建了一个以经济开放度、基础设施完善度、旅游开放度、生态环境、人力资本五个方面为一级指标,包括5个二级指标,18个三级指标的综合评价指标体系.采取主成分分析法、因子分析法、聚类分析法对关天经济区各市区2007-2014年的对外开放水平综合得分及排名进行了计算,并且将其综合得分进行聚类分析,研究结果显示:关天经济区的整体对外开放水平呈上升趋势,但各市(区)之间的对外开放水平差距过大;根据聚类分析结果,关天经济区的对外开放水平可以大致分为三类,其中,第一类别仅包括西安市,第二类则主要集中在天水,宝鸡、渭南、咸阳、商洛、铜川、杨凌则归于第三类.%The Guanzhong-Tianshui Economic Zone, covering eight cities and/or districts across Shaanxi and Gasu provinces, is a pivotal area for building a strategic highland for the China's inland economic development and opening-up.A comprehensive evaluation index system involving a set of primary, secondary and tertiary indicators is established with primary indicators reflecting aspects of economic openness, infrastructure, tourism openness, ecological environment and human capital.Principal component analysis, factor analysis and cluster analysis are used to measure the level of opening-up among cities within the Guanzhong-Tianshui Economic Zone during the time span of 2007-2014.Results have shown that the general level of opening-up of cities in the Guanzhong-Tianshui Economic Zone has been on the rise while discrepancies exist among individual cities.According to the results of cluster analysis, three categories of cities regarding the level of opening-up have been observed: the first category only includes the city of Xi'an, the second category is mainly concentrated around the city of Tianshui, and the third category comprises Baoji, Weinan, Xianyang, Shangluo, Tongchuan and Yangling.
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