This document discusses population growth and the demographic transition model. It explains that a population's growth is determined by the birth rate and death rate. If births exceed deaths, the population increases, and vice versa. It then outlines the 5 stages of the demographic transition model: 1) high birth and death rates with steady population, 2) high births and falling deaths leads to rapid growth, 3) falling birth and death rates leads to rapid growth, 4) continuing fall in rates leads to slower growth, 5) potential future stage with below replacement fertility and stable/falling population. The document provides examples of countries at different stages of the model.
This is the 10th lesson of the course 'Poverty and Environment ' taught at the Faculty of Social Sciences and Humanities, Rajarata University of Sri Lanka
Population and development are interlinked. It is not easy to distinguish cause and effect relationship between these two. However, they may reinforce each other and may provide some synergistic role.
This theory throws light on changes in birth and death rate and consequently on the growth rate of population. The relationship between birth and death rate changes with economic development and a country has to pass through different stages of population growth. This theory depicts the four stages of demographic transition that a country has to pass.
A Brief Discussion on demographic transition theory.Rizwan Khan
Demographic transition (DT) refers to the transition from high birth and death rates to lower birth and death rates as a country or region develops from a pre-industrial to an industrialized economic system.
IT IS GIVEN BY: FrankW. Notestein. Frank Wallace Notestein (August 16, 1902 – February 19, 1983)
The demographic transition theory is a generalized description of the changing pattern of mortality, fertility and growth rates as societies move from one demographic regime to another.
This is the 10th lesson of the course 'Poverty and Environment ' taught at the Faculty of Social Sciences and Humanities, Rajarata University of Sri Lanka
Population and development are interlinked. It is not easy to distinguish cause and effect relationship between these two. However, they may reinforce each other and may provide some synergistic role.
This theory throws light on changes in birth and death rate and consequently on the growth rate of population. The relationship between birth and death rate changes with economic development and a country has to pass through different stages of population growth. This theory depicts the four stages of demographic transition that a country has to pass.
A Brief Discussion on demographic transition theory.Rizwan Khan
Demographic transition (DT) refers to the transition from high birth and death rates to lower birth and death rates as a country or region develops from a pre-industrial to an industrialized economic system.
IT IS GIVEN BY: FrankW. Notestein. Frank Wallace Notestein (August 16, 1902 – February 19, 1983)
The demographic transition theory is a generalized description of the changing pattern of mortality, fertility and growth rates as societies move from one demographic regime to another.
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It described, how do we measure development. Various development indicators. HDI, GDP, GNP etc. Where India stands in HDI. the comparison among developed nations and among SAARC nations.
What id demographic transition model? How is it from one stage to another stage.what condition has our country in demographic transition model? reason behind the varying birthrate and death rate.
Presentation by Dr. Teppo Eskelinen, philospher and freelance journalist, discussing the concept of "development" and the relationship oj journalism to development
It described, how do we measure development. Various development indicators. HDI, GDP, GNP etc. Where India stands in HDI. the comparison among developed nations and among SAARC nations.
What id demographic transition model? How is it from one stage to another stage.what condition has our country in demographic transition model? reason behind the varying birthrate and death rate.
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1) To know how countries pass through different stages of population growth as shown in the five stages of the Demographic Transition Model (birth rate, death rate and natural population changes) and how it changes population structure
2) To understand the impact of increasing urbanisation, agricultural change, education and the emancipation of women on the rate of population growth
3. To know how to construct a population pyramid
4. To understand how to interpret population characteristics from a pyramid and how to predict likely future changes in a population.
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Prepare a presentation or a paper using research, basic comparative analysis, data organization and application of economic information. You will make an informed assessment of an economic climate outside of the United States to accomplish an entertainment industry objective.
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Population growth, demographic transition model and overpopulated places
1. HOW CAN WE KNOW IF A POPULATION IS GROWING OR DECREASING?
We can measure the birth rate and the death rate
If the birth rate is bigger,
population will increase
If the death rate is bigger,
population will decrease
As a result, we can measure the NATURAL INCREASE of the population
Where are the
countries with the
highest natural
population increase
or growth?
Where are the countries
with a negative natural
population growth?
2. THE BIRTH RATE:
It is the average number of live
births in a year for every 1000
people in the total population
THE DEATH RATE:
It is the average number of
deaths in a year for every 1000
people in the total population
The NATURAL INCREASE (decrease) is the
difference between the birth rate and the death rate
3. There are other important factors to know and predict the growth of the population
FERTILITY RATE
The fertility rate is an
estimate of the average
number of children a
woman will have during
her lifetime
It is measured using the
Total Fertility Rate:
TFR= Number of births /
number of women who
are between 15 and 49
To ensure population
replacement levels, the
fertility rate must be at
least 2.1 children per
woman
INFANT DEATH RATE
Infant Death Rate indicates the number
of children who die before their first
year per 1000 babies born during one
year
The formula is:
Number of deaths of babies under one year
divided by
Number of life births in that year
LIFE EXPECTANCY
It is the average
number of years
that a person can
live in a country
In which countries would you expect to find a high infant
death rate?
Why do we talk about “natural” population increase?
What other factors could affect population size?
4. Throughout the history the population has
increased
- Until the 19th century, world population grew slowly.
- In 1750, there were only 800 million people on the Earth
- Improvements in agriculture and medicine in developed countries
reduced the death rate and the population increased rapidly
- By the end of the 19th century, the world’s population reached 1.7
billion of people
- Population growth very fast during the second half of the 20th century:
From 3 billion in 1960 to six billion in 1999.
- Today the population has reached seven billion of people
Which are the main
problems of this fast
growth?
Is the growth the
same in all the
countries?
5. DEFINITION OF THE DEMOGRAPHIC TRANSITION
MODEL
The demographic transition model seeks
to explain the transformation of
countries from having high birth and
death rates to low birth and death rates.
In developed countries this transition
began in the eighteenth century and
continues today.
Less developed countries began the
transition later and are still in the earlier
stages of the model.
6. The world’s population has a certain evolution with different stages when the
births and the deaths have different rates
However, all the countries aren’t in the same stage
Every kind of country is in one of these stages throughout history
Poor developing countries are in the stage 2, less poor developing
countries are in the stage 3, developed countries are in the stage 4 and,
in the future, some developed countries will be in the stage 5
That evolution of the population is the DEMOGRAPHIC TRANSITION MODEL
8. POPULATION
STEADY
RAPID
GROWTH OF
THE
POPULATION
THE GROWTH
OF THE
POPULATION
IS LESS RAPID
THE GROWTH
OF THE
POPULATION IS
VERY SLOW,
STEADY OR
NEGATIVE
9. WHAT ARE THE STAGES OF POPULATION CHANGE?
THIS SEQUENCE IS CALLED “DEMOGRAPHIC TRANSITION MODEL”
10. STAGES OF THE DEMOGRAPHIC TRANSITION MODEL
STAGE 1:
• Many births & Many deaths
= Population is steady
• Until the Industrial
Revolution
STAGE 2:
• Many births & death rate falls very fast = Very fast
increase of the population
• Examples: The poorest developing countries
(Nigeria, Kenya, Bangladesh, Afghanistan...)
STAGE 3:
• Birth rate falls & Death rate falls
slowly = Rapid increase of the
population
• Examples: The richest developing
countries (Brazil, Mexico, India...)
STAGE 4:
• Birth rate is still falling & Death rate
is still falling = Slow increase of the
population
• Examples: The developed countries
(European countries, USA, Japan...)
STAGE 5?
• Birth rate is still falling & Death rate is stable = Decrease of
the population
• Examples:Italy, Sweden or Germany in the nearest future
11. Even if the World’s population has always increased, death rates have
overcome the birth rates during some moments of the History in certain
countries
BIG EPIDEMICS
Example:
Bubonic plague in middle ages in Europe
WARS
Example:
During the World Wars in some countries
NEW WAY OF LIFE IN WESTERN EUROPE ONE CHILD POLICY IN CHINA
12. WHY ARE SOME PLACES OVERPOPULATED?
Definition of overpopulated places:
They are the places where the number of people
overweigh the availability of resources
The are two reasons to have an overpopulated place
Increase in population
Example: Bangladesh
Low resources
Example: Somalia