Exploration of PPP Investment and Financing Model for Infrastructure: A Case Study of the Beijing-Tianjin-Hebei Region

Table 2

Relative proximity.

Liability risk index	x^+	S^+	S^+
Public organization	0.0035	0.0388	0.0271	0.4115
Social capital	0.0054	0.0176	0.0393	0.6893
Financial institutions	0.0095	0.0395	0.0231	0.5187