@techreport{NBERr1871,
 title = "The Diversification of Production",
 author = "Boyan Jovanovic",
 institution = "National Bureau of Economic Research",
 type = "Working Paper",
 series = "Reprint Series",
 number = "1871",
 year = "1994",
 month = "April",
 URL = "http://www.nber.org/papers/r1871",
 abstract = {},
}