Population Pyramid: When the age structure of population is classified by sex in the form of a histogram, it is called age-sex pyramid. The base of the pyramid shows very low age starting from zero, it increases as we move upwards. The top of the pyramid shows the maximum age above 85 years. Population pyramids are of 5-year intervals. On [...]
After reading this article you will learn about:- 1. Definitions of Optimum Theory of Population 2. Assumptions of Optimum Theory of Population 3. Explanation to the Theory 4. Superiority over the Malthusian Theory 5. Criticisms. Definitions of Optimum Theory of Population: The concept of optimum population has been defined differently by Robbins, Carr-Saunders and Dalton. Robbins defines it as "the [...]
This article throws light upon the top eight theories of population. Some of the theories are: 1. Thomas Doubleday's Diet Theory 2. Jouse De Castro's Protein Consumption Theory 3. Michael Thomas Sadler's Destiny Theory 4. Herbert Spencer's Biological Theory 5. Corrado Ginnis's Biological Population Theory and Others. 1. Thomas Doubleday's Diet Theory: Thomas Doubleday, a social philosopher and an English [...]