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Lecture

Demographers

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Department
Sociology
Course
SOCI 1P80
Professor
Professor Cottrel
Semester
Fall

Description
Life Expectancy • Demographers also study life expectancy, the estimated average lifetime of people born in a specific year. Life expectancy can vary depending on: 1) Nation -- In 1998, the life expectancy at birth for a person born in the U.S. was 76.1 years, compared to 80 years in Japan and less than 50 years in the African nations of Burundi, Chad, Rwanda, and Uganda. 2) Sex -- Females born in the United States in 2000 have a life expectancy of about 80 years, whereas men born in that year have a life expectancy of about 73 years. 3) Race -- African American men, for example, have a life expectancy at birth of about 65 years, compared to 74 years for white males. Migration • Migration refers to the movement of people from one geographic area to another • Migration can be voluntary (usually due to economic “push” and “pull” factors) or involuntary (forced migration due to war or other social conflict) • Immigration involves the movement into a geographic area, frequently to take up residency; emigration refers to the movement of people out of a geographic area • Today, about 900,000 people enter the U.S. each year • More than 23 million people live outside the
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