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Are Immigrants Really More ‘Fertile’?

8:01 AM, Jun 20, 2013 • By JONATHAN V. LAST
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One final, niggling statistical note: Jeb also said that immigrants "bring a younger population." Again, that's factually accurate; the average age of the foreign-born population is lower than the native-born average. (Though even that is a little hard to get at and requires creative accounting for the native-born children of foreign-born immigrants.) But the real question we worry about in demographics is a society's age-profile. And for complicated mathematical reasons, immigration does not necessarily make a country more youthful; in fact, in certain circumstances it can make a society even older and grayer. Anyone who's a glutton for complicated math can read Carl Schmertmann’s 1992 treatise on the subject. But don't say I didn't warn you. 

Jonathan V. Last is a senior writer at The Weekly Standard and the author of What to Expect When No One’s Expecting: America’s Coming Demographic Disaster (Encounter). 

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