The Dynamics of Returns to Education in Kenyan and Tanzanian Manufacturing*
利用1993-2001年肯尼亚和坦桑尼亚制造业员工的微观数据，估计教育回报率并考察收入函数的形状，发现肯尼亚教育回报长期下降，而坦桑尼亚在1990年代上升，且两国收入函数均为凸形，这有助于解释非洲教育快速扩张为何未能带来显著增长。
Abstract We use micro data on manufacturing employees in Kenya and Tanzania to estimate returns to education and investigate the shape of the earnings function in the period 1993–2001. In Kenya, there have been long‐run falls in the returns to education while for Tanzania there is evidence of rising returns in the 1990s. The earnings functions are convex for both countries and this result is robust to endogeneity. Convexity may be part of the explanation as to how rapid expansion of education in Africa has generated so little growth if expansion has been concentrated at lower levels of education.