本計畫想要建構一個內生成長模型討論生育率和勞動供給間的關係。實證上皆認為兩者呈現負向關係,但到目前卻沒有理論模型針對此關係做解釋。為了分析生育率和勞動供給,家計單位的效用函數除了消費外,還有生育率和勞動供給。而此處的勞動供給指的是平均每人的工作時間,因為勞動供給具有勞動參與和工作時間的特性,具有負效用的意涵,所以直接將勞動供給放在效用函數中,而不是以休閒放入效用函數的形式表示。延續Barro and Sala-i-Martin (2004)的模型加入勞動供給,分析在什麼參數空間下,可解釋實證資料的關係,並進一步討論這些條件的合理性。 We examine the relationship between fertility rate and labor supply in an endogenous growth model. Many empirical papers show that this relationship is negative but none of theoretical papers try to explain it. This proposal tries to find what kind of conditions under the model is consistent with this relationship. The definition of labor supply is generally hours of work per capita which include labor participation, employment and working hours. Thus, we need to directly add labor supply into utility function (not leisure) in order to capture the negative-utility implication of labor participation and employment.