@techreport{NBERw11142,
 title = "Lessons from the Technology of Skill Formation",
 author = "James J. Heckman",
 institution = "National Bureau of Economic Research",
 type = "Working Paper",
 series = "Working Paper Series",
 number = "11142",
 year = "2005",
 month = "February",
 URL = "http://www.nber.org/papers/w11142",
 abstract = {This paper discusses recent advances in our understanding of differences in human abilities and skills, their sources, and their evolution over the lifecycle.},
}