STUDY ON DISPARITY OF TOURISM SCALE FOR CITIES IN YANGTZE-DELTA AND CONSTRUCTION FOR THE SYSTEM OF RANK-SIZE DISTRIBUTION
以长三角15城市入境游客数为指标，用基尼系数等指标分析1991年来旅游规模差异，发现差异波动下降，并验证了城市旅游规模符合位序规模分布，为制定旅游发展策略提供参考。
With the development of tourism industry,research for disparity of tourism development is becoming more and more important in China.The quantity of foreign and domestic tourists has risen in every city,especially the cities of Yangtze-delta.Considering the possible statistical error in the number of the domestic tourists,this paper selects the number of entry-tourists as the criterion of tourism size.Based on the entry-tourists number of 15 cities in Yangtze-delta from 1991,the paper analyzed the difference of tourist scale among the cities in Yangtze-delta with four criterions that included Gini Coefficient,coefficient of variation,centralized degree and Herfindahi Index.Then discovered the difference be decline as its fluctuating.With these study on difference,the paper probed into the internal difference mechanism-Rank-size distribution.According as the transformation of size,the tourism development of cities in Yangtze-delta can be measured off as four: balanced-development,fluctuant-development,accelerated-development and decelerated-development.Via tropical analyze to the coefficient interrelated with rank-size from data of 14 years,the author find that the tourism scale of cities in Yangtze-delta tally with the rank-size distribution.With the basis of this judgment,the paper also studied some factors included economic development level,infrastructure,serving establishment,city function and resource distributing,which has brought about the difference and size distribution.If some government means to stipulate for suitable tourism development strategy,this paper could offer some reference.