An Urban Network Study of Government Procurement Activities: A Case Study of Northeast China

Table 4

Variables examined in the regression analysis.

Type of variables	Name	Symbol	Interpretation
Dependent variable	GPA connection	Conn	The number of GPA connections between supply city and demand city
Independent variables	Geographical distance	Distance	The geographical distance (km) between a pair of cities
	Supply population	Spop	Population of GPA supply city (10^4 persons)
	Demand population	Dpop	Population of GPA demand city (10^4 persons)
	Supply GDP	Sgdp	Gross domestic product of supply city (10^10 Yuan),
	Demand GDP	Dgdp	Gross domestic product of demand city (10^10 Yuan)
	Within the same province	Inpro	Dummy variable: 1, if two cities are in the same province and 0 otherwise. This variable is only included in the analysis of the regional network