Research on Excessive Revenue Distribution and Incentive Mechanism of Transportation PPP Projects from the Perspective of Fairness Preference

Considering the fairness preference of investors, this paper sets up a dynamically adjustable excessive revenue distribution and incentive mechanism according to the income of transportation PPP projects, in order to determine the excessive revenue of the government and social capital and dynamically adjust the distribution coefficient. The study shows that the increase of investors??? fairness preference will make it easier for investors to achieve high-effort behaviour choices. The coefficient of fairness preference is closely related to the proportion of excess return risk, which influences the reward and punishment mechanism.