The gaming behaviors between governments and investors in water environmental governance PPP projects will impact the effectiveness. This paper, aiming at their cooperating mechanism, establishes an evolutional gaming model between government and investors in water environmental governance based on a payment matrix on the basis of government (administrating or not) and investors (cooperative or opportunistic), and discusses their evolutional stability strategy, and reveals the impacts of behaviors on ideal stable strategy (administrating and cooperative). Cases are studied by means of Matlab software.
Their evolutional gaming tends to reach win\|win when governments and investors decrease their costs, increase their gains and governments strictly reward or punish the investors. This paper presents suggestions on improving supervision system, optimizing rewarding / punishing mechanism and boosting technical innovation favorable for water environmental governance PPP projects, so as to increase their cooperative benefits.
