The Impact of Spatial Structure on Economic Efficiency of Beijing-Tianjin-Hebei Megalopolis in China
Table 7
Test results of unit root.
Model
Test statistics
LLC
IPS
ADF
PP
lnTFP
−10.291 (0.000)
−4.572 (0.000)
48.201 (0.005)
354.161 (0.000)
Pri
−5.304 (0.000)
−1.949 (0.026)
44.094 (0.015)
92.830 (0.000)
Dis
−4.750 (0.000)
−0.047 (0.481)
37.059 (0.074)
20.258 (0.779)
△Dis
−9.709 (0.000)
−5.122 (0.000)
59.417 (0.003)
53.907 (0.000)
Gini
−3.185 (0.001)
−3.063 (0.000)
40.665 (0.034)
77.929 (0.000)
lnpop
−4.670 (0.000)
−0.512 (0.304)
29.846 (0.274)
19.271 (0.825)
△lnpop
−10.113 (0.000)
−4.088 (0.000)
63.021 (0.000)
48.143 (0.016)
lnpop∗Dis
−5.850 (0.000)
−0.805 (0.211)
37.133 (0.073)
27.211 (0.398)
△lnpop∗Dis
−13.297 (0.000)
−3.143 (0.000)
61.843 (0.000)
77.176 (0.000)
Hum
−2.772 (0.000)
−2.487 (0.000)
57.134 (0.000)
50.650 (0.003)
Infor
−7.961 (0.000)
−1.986 (0.024)
48.371 (0.005)
55.560 (0.001)
Indus
−6.196 (0.000)
−4.673 (0.000)
75.325 (0.000)
93.757 (0.000)
LS
−3.442 (0.003)
−3.970 (0.000)
58.270 (0.000)
84.086 (0.000)
Open
−2.945 (0.002)
−2.839 (0.002)
50.927 (0.006)
90.288 (0.000)
Gov
−3.712 (0.000)
−2.374 (0.009)
62.439 (0.000)
89.102 (0.000)
Edu
−38.665 (0.000)
−22.922 (0.000)
47.454 (0.006)
575.675 (0.000)
Note: ,,, and rejection of the original hypothesis at the significance level of 10%, 5%, and 1%, respectively; the value in brackets is the test p value of the corresponding variable; △ indicates the first-order difference test on the original test result for the variable.
