资源型城市演化阶段识别及其发展特征

卢硕, 张文忠, 余建辉, 李佳洺

The identification of spatial evolution stage of resource-based cities and its development characteristics

LU Shuo, ZHANG Wenzhong, YU Jianhui, LI Jiaming

表3 双重门槛模型估计结果

Tab. 3 Double threshold model estimation results

变量	系数估计值	标准误差	T值	95%置信区间
$x_{it} I (g_{it} < 0.019)$	0.652	0.378	1.470	[0.502, 0.716]
$x_{it} I (0.019 \leq g_{it} < 0.310)$	-0.521	0.061	-8.520	[-0.640, -0.401]
$x_{it} I (g_{it} \geq 0.310)$	-0.296	0.043	-6.810	[-0.381, -0.211]
_cons	0.397	0.008	48.650	[0.381, 0.413]