本研究首先建構一個無窮交替的兩期疊代模型，說明當經濟體系的年輕人口面臨流動性偏好之衝擊時，金融中介機構(銀行)可藉由其資產配置的功能，來分散年輕存款者的流動性風險，並達成極大化代表性個人效用之目的。 另外，當存款者具有不同的風險趨避程度時，本文亦分別考量金融中介機構是否受限於法定存款準備率的情形下，分析中間財貨生產部門不完全競爭程度的改變與各項政府政策變動如何影響其資產配置功能，並透過該管道來影響經濟體系的經濟成長率及名目利率。最後，我們將進一步分析在受限制的法定存款準備率之下，各項參數的變動將如何對社會福利水準產生影響。 / This study will first construct a two-period-lives overlapping generation model, indicating that when the young agents in the economy are facing “ liquidity preference shock”, financial intermediaries (banks) could disperse liquidity risk of young agents by the function of asset allocation, and to reach a purpose of representative individuals’ utility maximization. In addition, when depositors have different degrees of risk aversion, this text also considers the condition whether financial intermediaries binds reserve requirement rate respectively, analyzing how to through the changes of the extent of imperfect competition of the intermediate goods production sector and the government policy affect its function of asset allocation, and the impact on productivity growth rate and nominal interest rate of the economy mainly influenced by this channel. Finally, we will further analyze how to affect the social welfare through changes in the economic parameters under the condition of binding reserve requirement rate.