Aging Process of Population investigates and analyzes the phenomenon of population aging. The text aims to provide a quantitative and qualitative analyses of structural transformations caused by the aging population on modern societies in various parts of the world. The book is organized into four parts. The first part deals with problems in methodologies, such as methods to measure demographic old age; hypothetical and perspective computation tools; and deficient methodological uniformity of source materials. The second part discusses the beginning of old age; analysis of life tables; and the method of computing the normal length of life. Population structure by age in different time periods; dynamics of the changes in the age composition of populations in seven select countries; and the problem of dependency of non-productive elements on the population of productive age are examined in Part III. The last part provides the effect of fertility, reduction of mortality, migration, and war in the determination of the age structure of populations. Demographers, sociologists, statisticians, economists, politicians, market researchers, ecologists, and students will find the book invaluable.