Download dependent population

Interpreting and Analyzing
Population Pyramids &
Dependency Ratio
1. A wide base suggests a high
birth rate.
2. A narrowing base indicates a
falling birth rate.
3. Straight or near-vertical sides
show a low death rate.
4. A concave slope suggests a high
death rate.
5. Bulges in slope indicate high
rates of in-migration.
6. Or an excess in both males and
females could mean a baby boom.
7. Deficits in slope show outmigration or age-specific or sexspecific deaths such as war.
What is happening here? What shape do you see? What does this indicate?
Finding your population pyramid…
• Go to:
http://www.census.gov/population/internatio
nal/data/idb/informationGateway.php
• Under Select Report, choose: Population
Pyramid Graph
• Under Select country(ies), choose your home
country or a country of your choice.
• Click Submit
• Copy and paste your pyramid into a Word
document.
• Label your document properly.
• Now complete the questions on the following
slide – feel free to use whatever way to
annotate your pyramid.
– For example, you may use textboxes, etc.
Now describe your pyramid…
• Now that you have found your population
pyramid, spend a few minutes to describe the
shape of the pyramid.
• What statements can you make about the
pyramid?
• What is its shape?
• What does this indicate?
Which shape does your pyramid resemble? What about India? The UK? Which stage of the
Demographic Transition Model does your country belong to according to this? Is this
accurate?
What about Stage 5 of the DTM?
What shape do you think the pyramid would be? Why? Can you think of an example?
What are some of the defining characteristics of this type of pyramid? Why is this the
case? What could we annotate here? How is this pyramid different from that of Stage 4?
Stage 4 vs. Stage 5
A population pyramid typical of stage
4 - note the narrowing base, long life
expectancy and vase shaped profile
A population pyramid typical of
stage 5 - note the ever diminishing
base and very long life expectancies
Remember population pyramids…
• Tell us the sex structure of a population
• Tell us the age structure of a population
– Tell us the DEPENDENT POPULATION within a
country.
Dependent Population?
Dependent Population
• “Dependent population is defined as that part of
the population that does not work and relies on
others for the goods and services they consume.
In practice, specific population age groups have
in their entirety been categorized as dependent
population, even while the definition may not
necessarily apply to every individual in the
population with the indicated ages. In general
those categorized as dependents include the
children and the elderly. The rest of the
population constitutes the working age
population.”
A Note on Defining the Dependent Population Based on Age
Dependency Ratio
• The dependency ratio tells you how many
economically inactive people (0-15 and 65+) are
dependent upon the economically active
population (16-64).
• The following equation calculates a figure which
shows the number of economically inactive people
that are reliant on 100 economically active people.
• So a result of such as 81.3 would mean that for
every 100 economically active people there would
be 81.3 economically inactive (or dependent)
people.
Dependency Ratio
Copy and complete the following table:
COUNTRY
% of country’s
population in
0-15 age
bracket
% of country’s
population in
65+ age
bracket
Australia
18.9
13.9
United States
of America
20.2
13.0
United
Kingdom
17.4
16.6
China
19.9
8.2
Morocco
28.0
5.4
Haiti
35.9
4.4
Niger
50.1
2.0
% of country
that is
economicall
y inactive or
active
DEPENDEN
CY RATIO
So what?
• WHY WOULD IT BE IMPORTANT TO KNOW
HOW MUCH OF A POPULATION IS
‘DEPENDENT’?
• Who is this relevant to?
• Who does this effect?
• Why?
• How?
Questions…
• What are the effects of a country having a
high dependency ratio?
• Particularly, what are the effects of a country
having a high youthful population?
• What are the effects of having a large ageing
population?
What are the Causes, Effects,
and Responses to Youthful and
Aging Populations?
Causes, Effects, and Responses
Youthful
Aging
Advantages
Advantages
Causes
Effects
Disadvantages
Disadvantages
Solutions