.SystemDynamics.WorldDynamics.World3.Scenario_7

Information

We now want to try out another approach. Instead of improving the means of production, we shall attempt strict birth control. Every family is limited to two children only. Due to the age structure momentum, the population keeps growing for another generation. Then it will finally start on its path of natural attrition.

References:

1. Meadows, D.H., D.L. Meadows, J. Randers, and W.W. Behrens III (1972), Limits to Growth: A Report for the Club of Rome's Project on the Predicament of Mankind, Universe Books, New York, 205p.
2. Meadows, D.L., W.W. Behrens III, D.M., Meadows, R.F. Naill, J. Randers, and E.K.O. Zahn (1974), Dynamics of Growth in a Finite World, Wright-Allen Press, 637p.
3. Meadows, D.H., D.L. Meadows, and J. Randers (1992), Beyond the Limits, Chelsea Green, 300p.
4. Meadows, D.H., J. Randers, and D.L. Meadows (2004), Limits to Growth: The 30-Year Update, Chelsea Green, 368p.

In order to accomplish this change, you need to reset two of the switching times in the model:

parameter Real t_fert_cont_eff_time(unit="yr") = 2002 "Year of continued fertility change";.

parameter Real t_zero_pop_grow_time(unit="yr") = 2002 "Time to zero population growth";.

Simulate the model from 1900 until 2100, and display the same variables as in the book Limits to Growth: The 30-Year Update at page 241: