@techreport{ w12929,
 title = "Cycling: An Increasingly Untouched Source of Physical and Mental Health",
 author = "Inas Rashad",
 institution = "National Bureau of Economic Research",
 type = "Working Paper",
 series = "Working Paper Series",
 number = "12929",
 year = "2007",
 month = "January",
 URL = "http://www.nber.org/papers/w12929",
}