You revive a dead battery by jolting it to life with a jumper cable: an extraordinary measure used in an emergency. So if you hope to stimulate a foundering economy, you want to jump-start it. Kick-starting is an old-fashioned and difficult way of starting a motorcycle, so it is logically an inappropriate label for a shortcut method of getting something going. But the popularity of Kickstarter.com has probably made this a hopeless cause.