| http://www.w3.org/ns/prov#value | - In their January 2000 projections, the Census Bureau states that immigration is a highly inefficient means of reducing the ratio of retirees to working-age share of the population in the long term.11 Our results confirm this finding.12 Of course, the similarity between our results and those of the Census Bureau is to be expected because we base our estimates on their projections of birth and dea
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