@techreport{NBERw9021,
 title = "The Impact of Social Policy and Economic Activity Throughout the Fertility Decision Tree",
 author = "Phillip B. Levine",
 institution = "National Bureau of Economic Research",
 type = "Working Paper",
 series = "Working Paper Series",
 number = "9021",
 year = "2002",
 month = "June",
 URL = "http://www.nber.org/papers/w9021",
}