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利用核密度函数、收敛理论及空间计量方法对1997—2012年我国大陆31省区的农业碳生产率分布演进规律、收敛趋势、聚类状况和俱乐部特征等进行探究。结果表明:1)全国及三大地区农业碳生产率均呈现明显的增长态势,省域间差异扩大,空间分布上逐渐不均衡化,且由较为明显的“一主三小”的四峰格局演变为“一主一次”的双峰格局,具有多个地区集聚的可能。2)全国农业碳生产率整体不存在σ收敛迹象,而东西部农业碳生产率存在较为明显的σ收敛现象。3)我国农业碳生产率呈现绝对β趋同特征,但收敛速度相对较小,仅有0.65%;同时,空间自相关指数进一步证实我国省域农业碳生产率存在集聚现象,且4个象限不同集聚类型地区的β收敛系数全为负,但仅有H-H和L-L两组表现出较为显著的空间俱乐部收敛趋势。
Using the kernel density function, the convergence theory and the spatial metrology method, this paper explores the evolution law, convergence tendency, clustering status and club characteristics of agricultural carbon productivity distribution in 31 provinces and autonomous regions of mainland China from 1997 to 2012. The results showed as follows: 1) Agricultural carbon productivity in China and the three major regions all showed a clear growth trend, with the differences between provinces widening and the spatial distribution gradually became unbalanced, and the more obvious “four primary peaks and three small peaks peaks” The pattern evolves into a bimodal pattern of “one master s ” and has the possibility of gathering in many areas. 2) There is no sign of σ convergence in the national agricultural carbon productivity as a whole, while there is a more obvious σ convergence in agricultural carbon productivity in the eastern and western regions. 3) China’s agricultural carbon productivity presents an absolute β-convergence characteristic, but its convergence rate is relatively small, only 0.65%. At the same time, the spatial autocorrelation index further confirms the accumulation of agricultural carbon productivity in China’s provinces, and the four quadrants with different agglomeration types The coefficients of β convergence are all negative, but only HH and LL show more significant spatial club convergence trend.