Population Growth Models

When you click on the button below corresponding to your CAS, you will be able to download the file corresponding to Part 3 of this module.

Part 3: World Population Growth

In this part we attempt to model the growth of a population very important to us -- human population of the world. Only in the 20th century has it become possible to make reasonable estimates of the population of the world, current or past. The following table lists some of those estimates, based in part on data considered "most reliable" in a 1970 paper and in part on both overlapping and more recent data from the U. S. Census Bureau. Of course, the earliest entries are at best educated guesses. The later entries are more likely to be correct -- at least to have the right order of magnitude -- but you should be aware that there is no "world census" like the decennial U. S. census.

• 3.1   Natural and Coalition Models

• 3.2   The Coalition Model

• 3.3   Solving the Coalition Model

• 3.4   When is Doomsday?

• 3.5   Revision of the Model