As world ages, immigration seen as big boost to US

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WASHINGTON— Americans are among the least likely to be concerned about retirement security, or to view the growing number of older people as a major concern, a new global study finds.

The analysis of surveys across 21 nations by the Pew Research Center describes advantages to higher rates of immigration for the United States: higher population growth and a slower rate of population aging compared to the rest of the world.

The surveys found that people in nations where the population is aging less swiftly, such as the U.S., are less likely to be worried about their old-age futures than those in parts of Europe and East Asia that are grappling with a swiftly shrinking workforce and increasing pension costs.

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