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1
**Population Pyramid & Demographic Model**

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**Population Pyramid: Stage 1**

Expansive Concave sides High Birth Rate High death rate Short life expectancy Rapid fall in each upward age group due to high DR

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**Population Pyramid: Stage 2**

Expansive Straight sides Still high birth rate Falling death rate Slightly longer life expectancy Fall in DR so more people living into middle age

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**Population Pyramid: Stage 3**

Stationary Convex sides Declining birth rate Low death rate Long life expectancy An increasing proportion of the population is in the 65+ age group

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**Population Pyramid: Stage 4/5**

Contractive Convex sides Very low birth rate Low death rate Longer life expectancy Higher dependency ratio

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**Demographic Transitional Model**

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**Demographic Transition model Compared to Population Pyramid**

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