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Mathematical Problems in Engineering
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2021
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Article
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Tab 8
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Research Article
Research on the Impact of Expressway on the County Economy Based on a Spatial DID Model: The Case of Three Provinces of China
Table 8
The Wald test results.
Index
Guangdong
value
Hubei
value
Qinghai
value
H
0:
θ
= 0
87.04
0
69.99
0
33.75
0
H
0:
θ
+
ρβ
= 0
46.37
0
87.83
0
51.53
0