Presentation on theme: "Demography and Aging. What is “demography”? Demography is the study of populations Counting and describing people Age, sex, income, marital status… Demographers."— Presentation transcript:
What is “demography”? Demography is the study of populations Counting and describing people Age, sex, income, marital status… Demographers calculate life expectancy birth and fertility rates average age at marriage…
Three basic processes affect population Fertility Mortality Migration Many factors affect these processes Economic development, technology, religious and cultural values…
6. Gender distribution Are the majority of U.S. older adults men or women? Why?
Population pyramids Also known as “age-sex pyramid” or age structure diagram Shows how the “shape” of population changes Often from pyramid (more younger people at the bottom, few old people) to rectangle (more equal distribution between ages)
Uneven geographic distribution Differences in fertility, mortality, and migration create different population characteristics in different areas Differences between countries Differences within countries Which places in the U.S. are “old”? Which places are “young”? What difference does that make??
Education, Percentage by Race and Hispanic Origin
Changes in families… …affect who is available to take care of an older person. Smaller families Marriages and births at later ages Increased likelihood of divorce More blended families …and the living arrangements of older people.
7. Who helps us when we are old? Dependency ratios Old age dependency ratio - % of population 65+ compared to % of population 18 to 64 (the “workers”). Fewer workers supporting more older people So old age dependency ratio is INCREASING
Other ratios… Childhood dependency ratio - % population age 0-17 compared to % population 18 to 64. This is DECLINING Overall dependency ratio - STABLE