农业集聚对农业面源污染的影响——基于中国地级市面板数据门槛效应分析

邓晴晴, 李二玲, 任世鑫

Impact of agricultural agglomeration on agricultural non-point source pollution: Evidences from the threshold effect based on the panel data of prefecture-level cities in China

DENG Qingqing, LI Erling, REN Shixin

表3 门槛效应检验

Tab. 3 Threshold effect test

被解释变量 门槛数 F统计值 P值 1%临界值 5%临界值 10%临界值 门槛估计值 95%置信区间 lnCOD 单门槛 26.060** 0.016 26.899 20.000 16.521 0.976 [0.966, 0.982] 双门槛 2.630 0.971 25.492 19.144 15.434 三门槛 5.210 0.713 24.562 17.231 14.471 lnTN 单门槛 32.630*** 0.003 25.922 19.893 16.566 -0.320 [-0.348, -0.304] 双门槛 8.380 0.576 25.446 20.047 16.149 三门槛 3.800 0.926 25.866 17.970 15.593 lnTP 单门槛 23.37** 0.040 30.472 21.795 17.365 0.452 [0.427, 0.456] 双门槛 4.520 0.854 28.731 20.481 16.972 三门槛 4.120 0.891 28.251 20.413 17.156