@techreport{NBERw12869,
 title = "Has Social Security Influenced Family Formation and Fertility in OECD Countries? An Economic and Econometric Analysis",
 author = "Isaac Ehrlich and Jinyoung Kim",
 institution = "National Bureau of Economic Research",
 type = "Working Paper",
 series = "Working Paper Series",
 number = "12869",
 year = "2007",
 month = "January",
 URL = "http://www.nber.org/papers/w12869",
}