Research on the Impact of Expressway on the County Economy Based on a Spatial DID Model: The Case of Three Provinces of China

Table 12

Direct, indirect, and total effects.

Variables	Guangdong	value	Hubei	value	Qinghai	value
exp	−0.0127	0.382	−0.0467	0.000	0.0276	0.548
Wexp	0.1492	0.000	0.1090	0.003	0.3204	0.026
Direct effect	−0.0065	0.650	−0.0413	0.000	0.0494	0.308
Indirect effect	0.1963	0.000	0.1517	0.016	0.4940	0.033
Total effect	0.1898	0.000	0.1104	0.091	0.5434	0.032