“A key strength of the book is the serious endeavor to go beyond traditional demographic approaches and incorporate more sophisticated mathematical analyses in the quest to integrate models for health, biology, and lifespan. A reasonable job is done of highlighting useful stochastic models for longitudinal data. Another positive is the variety and quality of the data used.” (Anthony Medford, Canadian Studies in Population, Vol. 46, 2019)“The book is an effort to conciliate the empirical evidence that indicates that aging is a multidimensional process that involves changesin many variables, such as biomarkers. Thus, the book contributes at integrating biological knowledge and methods with traditional demographic analyses. Population scientists interested in population and biological mechanisms of aging will find this book valuable since it provides an overview of the most recent developments in the field.” (Vladimir Canudas-Romo and José Manuel Aburto, European Journal of Population, Vol. 33, 2017)