TY - JOUR A1 - Schoen, Robert T1 - The metastable birth trajectory Y1 - 2009/11/18 JF - Demographic Research JO - Demographic Research SN - 1435-9871 SP - 759 EP - 764 DO - 10.4054/DemRes.2009.21.25 VL - S8 IS - 25 UR - https://www.demographic-research.org/special/8/25/ L1 - https://www.demographic-research.org/special/8/25/s8-25.pdf L2 - https://www.demographic-research.org/special/8/25/s8-25.pdf N2 - The metastable model generalizes the stable population model by allowing net maternity to change exponentially over age and time. As a result, the metastable model generates an exponentially quadratic birth trajectory, which is characterized by a constant proportion of births by age of mother. The metastable model is well suited to analyzing steady fertility declines and transitions between two regimes of fixed vital rates. ER -