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

Table 5

Moran’s index (Moran’s I) of the GDP of the counties of Guangdong, Hubei, and Qinghai in 2004–2017.

Year	Guangdong	Hubei	Qinghai
2004	0.494	0.315	0.453
2005	0.495	0.306	0.467
2006	0.486	0.315	0.45
2007	0.47	0.33	0.469
2008	0.462	0.349	0.442
2009	0.462	0.328	0.431
2010	0.441	0.327	0.44
2011	0.438	0.33	0.434
2012	0.46	0.325	0.424
2013	0.446	0.317	0.448
2014	0.452	0.313	0.459
2015	0.451	0.307	0.443
2016	0.453	0.304	0.434
2017	0.462	0.303	0.414