This study investigates the rates of technological progress, total output growth, and per capita output growth when population growth is negative using a semiendogenous research and development (R&D) growth model. The analysis shows that within a finite time horizon, the employment share of the final goods sector reaches unity and that of the R&D sector reaches zero; accordingly, the rate of technological progress tends toward zero. In this case, the growth rate of per capita output asymptotically approaches a positive value.