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U.S. Demographic Trends and Their Implications

The 2000 Census confirmed what demographers have known for some time: the United States is experiencing fundamental demographic shifts. Birth rates have declined, average family size has fallen, and people are living longer. Meanwhile, immigrants compose a larger share of the population than ever before: between 15 and 20 percent. These trends pose stark challenges for the U.S., including coping with a reduced workforce, caring for a growing elderly population, assimilating the steady flow of immigrants into its mainstream, and reducing barriers to economic opportunity.

Our work on U.S. population trends has considered the following topics:

  • Current population trends in the U.S. and their social and political implications
  • The growing complexity of America's racial and ethnic composition
  • How the flow of immigrants has affected California over the past 30 years
  • A demographic overview of metropolitan Pittsburgh

See publications on this topic.

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