The Quantum and Tempo of Life-Cycle Events • John Bongaarts, Population Council ; Griffith Feeney, University of California, Berkeley

A “Lineage” Matrix Population Model of the Rendille of Northern Kenya • Merwan H. Engineer, University of Victoria ; Ming Kang, University of Victoria

Health, Survival and Consumption over the Life Cycle: An Optimal Control Approach • Michael Kuhn, Max Planck Institute for Demographic Research ; Alexia Fuernkranz-Prskawetz, Vienna Institute of Demography ; Stefan Wrzaczek, Vienna University of Technology ; Gustav Feichtinger, Vienna University of Technology

On Fisher’s Reproductive Value and Lotka’s Stable Population • Carlos Galindo, El Colegio de México