"The man who parties like there is no tomorrow puts his body through an “up” and a “down” course that looks a lot like the business cycle. At the party, the man freely imbibes. He has a great time before stumbling home at 2:00 a.m., where he crashes on the sofa. A few hours later, he awakens in the grip of the dreaded hangover. He then has a choice to make: get a short-term lift from another drink or sober up. If he chooses the latter and endures a few hours of discomfort, he can recover. In any event, no one would say the hangover is when the harm is done; the harm was done the night before and the hangover is the evidence." - from The House That Uncle Sam Built by Steve Horwitz and Pete Boettke
To read the story of what caused the housing bubble that led to the economic collapse of 2008, go here.