# SOC312H1 Chapter Notes - Chapter 4: Hans Rosling, Maternal Death, Population Momentum

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Hans Rosling Global population growth box by box (TED talks)
Lecture 4: Demographic Composition Age and Sex Structure
Principles of Age and Sex Composition:
Three age segments of key interest
o Under 15, aged 15-65, 65 and older
Rough approximately for calculating economic dependency burden in a society
Total-, youth-, and old age dependency ratios
Social insurance more generous for elderly; the development of infrastructure
around health and social insurance, has grown
disproportionately for elderly than children. (not
building more schools, etc.)
Age pyramids:
o Pictorial representation of age and sex
composition
Canada’s age pyramid in 2006 (Fig 4.1)
o Baby boomers, busters, children of
boomers, etc.
General typology of age pyramids
o More vs. Least developed yet (Fig 4.2)
o Rapidly growing vs. Constant growing.
Declining population type pyramids ( fig 4.3)
-Slight bulge to the right side; not perfectly
symmetrical because of higher mortality rates for
men, and there’s more hollowing effect (women have
longer life, take care of self,)
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developing countries (less developed).
Determinants of Age Composition:
Stable population distribution conditions:
o What is stable is the shape of the age distribution
Could have a growth in a population, but if we’re somehow able
to hold the age distribution constant, what would happen
**Age distribution just constant, the population can grow or
decrease
o Stationary population is a particular kind of stable population (zero
growth= constant size and age pyramid)
Stable pop model allows us to explore ‘what if scenarios’
o Allows us to compare countries
o Like those described in Table 4.3 (different combinations of mortality
and fertility)
o Mortality improvements n young vs. Aging pops (Fig 4.4)
GRR = Growth reproductive rate (the higher the level 4 is the more higher birth rate than
1)
-ie. We have high life expectancy (level 6, 70 years old) and allow fertility rate (1.0) you’re
going to have a higher old age (21.9 60 years +) (this is the society that Canada is right
now; but if you have fertility rate of 4.0, then you have a gross young population (54.1) are
between the ages of 0-14
*Helps us think about the what if situations
-Young population is on top they improve infant survival (+), and then you have the
negative (maternal mortality decline) --> less maternal mortality tends to increase fertility
which tends to increase the young population
(also, arrows are solid, strong effects)
-Old population they’re dotted arrows (suggesting weaker effects); putting a lot of
investments in old age care (helping people live with chronic diseases) increase the
population of 65+
Crude and Intrinsic growth rates
o Rate of natural increase (RNI) based on crude rates does not take into
account current age composition
Comparative analysis compromised
In demography, want to compare one society with another, or same
society in different periods of time
o Use intrinsic rate of growth can be calculated instead
How? Use the reference of stable population
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## Document Summary

Hans rosling global population growth box by box (ted talks) Lecture 4: demographic composition age and sex structure. Three age segments of key interest: under 15, aged 15-65, 65 and older. Rough approximately for calculating economic dependency burden in a society. Total-, youth-, and old age dependency ratios. Social insurance more generous for elderly; the development of infrastructure around health and social insurance, has grown disproportionately for elderly than children. (not building more schools, etc. ) Age pyramids: pictorial representation of age and sex composition. Canada"s age pyramid in 2006 (fig 4. 1: baby boomers, busters, children of boomers, etc. General typology of age pyramids: more vs. Least developed yet (fig 4. 2: rapidly growing vs. Slight bulge to the right side; not perfectly symmetrical because of higher mortality rates for men, and there"s more hollowing effect (women have longer life, take care of self,) Stable population distribution conditions: what is stable is the shape of the age distribution.

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