中文摘要：

提出适用于随机Learning—byDoing模型的“附加效用”值函数解法，并用此方法求解具有不完全技术外部性的随机learning—by-doing模型，得到了均衡时的经济增长路径、消费一资本比和值函数，讨论了技术外部性对私人资本回报率、消费倾向、均值经济增长率和个体福利的影响．

英文摘要：

In this paper, on ＂additional utility＂ value function method suited stochastic learning-by-doing models is proposed and a stochastic learning-by-doing model with incomplete technological externality is resolved by it. The economic growth path, the consumption-capital ratio and the value function in equilibrium are derived and the effects of technological externality on the return rate of private capital, the propensity to consumption, and the mean economic growth rate and individual welfare are all discussed.