Population momentum expresses population aging

Substance Abuse in Aging Population

substance abuse' specially opiates and prescribed drugs are spreading among the older adults. Most of the time it begins as an attempt to medicate chronic pains, medical conditions and loneliness. In other instances, it simply is the continuation of a problem that begun in young adulthood. But scholars and specialists in both fields of Addiction and Gerontology, rather neglected this fast growi...

The Phenomenon of Population Aging in Iran

Elham Fathi Statistical Center of Iran   Abstract. In the past, few people reached old age, but in todaychr(chr('39')39chr('39'))s world, advances in technology and health have allowed people to live longer and die at an older age, so Now more people can experience aging. On the other hand, since almost all countries of the world have gone through or are going through a period of high fertilit...

Population Dynamics: Momentum of Population Growth

This article summarizes the recent literature on population momentum, usually defined as the subsequent population growth or decline after replacement conditions have been achieved. We review total momentum, its constituent parts (nonstable and stable momentum), trends over time, and how momentum is affected by immigration and emigration. Numerical examples are provided. The unifying concept is...

Population Stability and Momentum

One commonly prescribed approach for understanding the stability of a system of dependent variables is that of Lyapunov. In a possible alternative approach: when variables in the system have momentum, then that can trigger additional dynamics within the system causing the system to become unstable. In this study, stability of population is defined in terms of elements in the set of births and e...

Iranian Population Policy and Aging: New Health Concerns