Timbergen's work was later built on by Lawrence Klein, contributing to another Nobel Prize.
See also
External Links
... the age of 18, 6.2% from 18 to 24, 17.7% from 25 to 44, 36.0% from 45 to 64, and 12.5% who are 65 years of age or older. The median age is 44 years. For every 100 ...