The values of the two firms were calculated by real option methods, the possible equilibriums was checked and the optimal investment rules of the two firms was determined.

• 建立了一个双寡头模型，用实物期权方法计算了模型中2个公司的价值，并分析了模型的均衡状态，给出了影响产品需求的随机因素位于不同区间上时，2公司的均衡状态及其最优的投资决策。