Blogs

By David A. Swanson (dswanson@ucr.edu), Dickson Emeritus Professor, Department of Sociology, University of California Riverside and Regional Affiliate, Center for Studies in Demography and Ecology, University of Washington Sickle cell disease is a genetically-inherited, painful, crippling, life-threatening condition affecting at many as 100,000 people in the United States. Despite the prevalence of sickle cell disease, little is known about the life expectancy of people who suffer from it. Using mortality data generated in a population-based surveillance study of patients with sickle cell disease over the period 2004-2008, I created a life table for the ...

By Arni S.R. Srinivasa Rao, Professor and Director, Laboratory for Theory and Mathematical Modeling, Division of Infectious Diseases, Medical College of Georgia. This is a non-technical summary - download the full article here . The NRR is a frequently computed reproductive measure in demography that is often used for evaluating replacement-level fertility in a population. Alfred Lotka and Robert Kuczynski popularized it in the United States while understanding population growths and replacement levels [1,2]. This technical piece introduces a concise debate on the implications of NRR (net reproduction rate), given that NRR only represents what we ...