Understanding the concept of demography, its features and factors and an introductory discussion on the Theories of Population.

1. Mr. and Mrs. Ryan Cloyd Q. Villanueva
– Geraldine S. Villanueva
SocSci7: Sociology and
Anthropology

2. Objectives

3. Demography: The Study of Population
Demography – the discipline that studies the current
state and changes over time in size, distribution and
common of human population.
Methods of demography:
1. Census
2. Head Count

4. Demographic Variables:
1. Fertility
2. Mortality
3. Migration

5. Fertility: Reproducing for Survival

9. Mortality
Life Expectancy
Is one of the aspects of population that is analyzed by
demography. Mortality is computed thru Crude Death
Rate (CDR).
CDR = numbers of deaths total population x 1000

10. Migration
Types of Migration:
 Immigration is the movement of
people into a society from outside.
 Emigration is the departure of people
from a society.
Factors Influencing Migration:
Push Factors – reasons that lead people to
leave specific territories.
Pull Factors – move into other societies
though is shaped by the presence of
incentives such as economic
opportunities, peace, and political

11. Theories of Population
1. Robert Malthus
“The Malthusian
Theory” 2. Demographic
Transition
Theory
3. Paul R. Ehrlich
“Zero Population
Growth”

12. “The Malthusian Theory”

13. Demographic Transition Theory

14. Zero Population Growth

15. Population and Culture