非均衡发展条件下地级市经济差距时空特征

Spatial-Temporal Characteristic of Economic Gap of Prefecture-Level City under the Condition of Non-Balanced Development

为探讨中国在东北及中西部地区大力发展核心城市的同时，是否拉大核心城市与周边地区的经济差距，文章基于地区基尼系数对20世纪末期以来地级市经济差距时空特征进行分析，结果表明：中西部地区地区基尼系数存在增长趋势，并且由分散走向集聚，逐步形成东南一西北的区域分化；内蒙古、甘肃、陕西等地逐步演化为地区基尼系数的热点区，而长三角地区、珠三角地区成为地区基尼系数的冷点区；地区基尼系数具备较强的时间稳定性；地区基尼系数高水平区的城市类型在不同的时间段比例变化较大。在此基础上，结合增长极理论指出区域政策存在的不足。

In order to explore whether the development of core cities in Northeast China and the central and western regions has an influence to the economic gap between the core cities and the surrounding areas, based on the regional gini coefficient of the prefecture level since the late 20th century, this paper analysis spatial-temporal characteristic of economic gap of prefecture-level city. Results show that the regional gini coefficient in central and western region exists growth trend, which is changing from the scattered to the agglomeration, and gradually form the regional differentiation of northwest-southeast; Neimenggu, Gansu and Shaanxi had evolved to hot zone of regional gini coefficient, while Yangtze river delta, the pearl river delta region to cold spots area of regional Gini coefficient; regional gini coefficient have stronger time stability; regional Gini coefficient of the urban type high levels of a larger percentage change in different time period. Combining the theory of growth pole, this paper put forward the deficiency existing in regional policy.