U.S. cities are in a battle to attract young, educated workers before they turn old (read 35) and settle down. With boomers retiring, this has serious economic implications for cities.

An excerpt from the NYT story:

Some cities will do anything they can think of to keep young people from fleeing to a hipper town.

In Lansing, Mich., partiers can ease from bar to bar on the new Entertainment Express trolley, part of the state’s Cool Cities Initiative. In Portland, Ore., employees at an advertising firm can watch indie rock concerts at lunch and play “bump,” an abbreviated form of basketball, every afternoon.

And in Memphis, employers pay for recruits to be matched with hip young professionals in a sort of corporate Big Brothers program. A new biosciences research park is under construction — not in the suburbs, but downtown, just blocks from the nightlife of Beale Street.

These measures reflect a hard demographic reality: Baby boomers are retiring and the number of young adults is declining. By 2012, the work force will be losing more than two workers for every one it gains.

Cities have long competed over job growth, struggling to revive their downtowns and improve their image. But the latest population trends have forced them to fight for college-educated 25- to 34-year-olds, a demographic group increasingly viewed as the key to an economic future.

Mobile but not flighty, fresh but technologically savvy, “the young and restless,” as demographers call them, are at their most desirable age, particularly because their chances of relocating drop precipitously when they turn 35. Cities that do not attract them now will be hurting in a decade.

“It’s a zero-sum game,” said William H. Frey, a demographer with the Brookings Institution, noting that one city’s gain can only be another’s loss. “These are rare and desirable people.”