@techreport{NBERw13190,
 title = "Wisdom and Creativity in Old Age: Lessons from the Impressionists",
 author = "David W. Galenson",
 institution = "National Bureau of Economic Research",
 type = "Working Paper",
 series = "Working Paper Series",
 number = "13190",
 year = "2007",
 month = "June",
 URL = "http://www.nber.org/papers/w13190",
}