Riding our bike to work means that we may occasionally be attacked by marauding curbstones. On the benefit side, we are not being mugged by auto-mechanics, or unpleasant dictatorships with thoroughly undeserved good luck in geography. Overall, the bike is still a clear winner.
This article available online at:
http://www.theatlantic.com/business/archive/2007/10/an-economic-analysis-of-the-bike-commute/2138/
