The results indicated that with the growth of the children, the strategies children used transformed from the imitationstrategy and exchange strategy to the covert strategy and inversion strategy.
结果表明：随着年龄的增长，儿童使用的策略由模仿、交换向内化、相反数策略转化；
2
Suppose there is no imitation, license contract with two-part tariff or pure royalty per unit may be the optimal licensing strategy in product-differentiated Cournot Duopoly.