In this book the author investigates the impact of demographic change oneconomic growth. As a result of the current financial crisis, a new view oneconomics has been demanded by various scientists. The author provides such anew view on economic growth, using a methodology of system dynamics. Byapplying this method, the author focuses on characteristics ofcomplex systems and analyzes aging and shrinking processes, and not onlypositive growth. Delays and feedback processes are also considered. This leads todeeper and revealing insights into economic behavior. In doing so, a newsemi-endogenous growth model is developed by introducing a specific anddetailed population sector (demographic growth model). The book shows andanalyzes the behavior of such a model and tests several policy scenarios ina transfer chapter to apply the new theoretical approach on real worldproblems. The major results are summarized in 15 principles of demographicgrowth.