Resources Science

Dynamic characteristics and differentiation of construction land supply in shrinking small and medium-sized cities

ZHOU Zhen, CHEN Hao, WANG Lei

Resources Science, 2024, 46(2): 321-335. DOI: 10.18402/resci.2024.02.07

特征量	计算公式	变量含义
绝对量	$A Q F i = ∑ t = 1 T S i, t T$	式中：AQF_i为城市样本i在研究期的绝对水平；S_i_,_t为样本i在年份t的取值；T为年份跨度
趋势	$T F i = ∑ t = 1 T S i, t - S t ¯ t - T 2 ∑ t = 1 T t - T 2 2$	式中：TF_i为样本i在研究期指标的长期变动趋势； $S t ¯$ 为样本i在T年间的平均值
波动性	$V F i = ∑ t = 1 T S i, t - S t ¯ 2 T - 1$ $X t ¯ = ∑ t = 1 T S i, t T$	式中：VF_i为样本i在研究期指标随时间变化的波动程度
偏度	$S C F i = ∑ t = 1 T S i, t - S t ¯ 3 T σ i 3$ $σ i = ∑ t = 1 T S i, t - S t ¯ 2 T$	式中：SCF_i为样本i在研究期指标的对称性；σ_i为样本i在T年间的年际标准差
峰度	$K C F i = ∑ t = 1 T S i, t - S t ¯ 4 T σ i 4 - 3$	式中：KCF_i为样本i在研究期分布曲线的陡峭程度

Table 2 Temporal feature extraction

Other figure/table from this article

Table 1 List of shrinking small and medium-sized cities
Table 3 Influencing factors of construction land supply in shrinking small and medium-sized cities
Figure 1 Distribution of shrinking small and medium-sized cities and reference cities
Table 4 Balance test of propensity score matching
Table 5 Dynamic and static characteristics of land supply indicators of shrinking small and medium-sized cities and reference cities, 2010-2020
Figure 2 Panel clustering results
Table 6 Comparison of construction land supply indicators of three types of shrinking small and medium-sized cities
Table 7 Fundamentals of three types of cities
Table 8 Logistic regression parameter estimation results of inter-group difference
Table 9 Logistic regression parameter estimation results of intra-group difference