@techreport{NBERw14053,
 title = "Health, Stress, and Social Networks: Evidence from Union Army Veterans",
 author = "Dora L. Costa and Matthew E. Kahn",
 institution = "National Bureau of Economic Research",
 type = "Working Paper",
 series = "Working Paper Series",
 number = "14053",
 year = "2008",
 month = "June",
 URL = "http://www.nber.org/papers/w14053",
}