@inbook{NBERc3741,
 Crossref = "NBERbeck75-1",
 title = "Appendix B: Mathematical Discussion of Relation between Age, Earnings, and Wealth",
 author = "Gary S. Becker",
 BookTitle = "Human Capital: A Theoretical and Empirical Analysis, with Special Reference to Education, 2nd ed.",
 Publisher = "NBER",
 pages = "257-264",
 year = "1975",
 URL = "http://www.nber.org/chapters/c3741",
}
@book{NBERbeck75-1,
 title = "Human Capital: A Theoretical and Empirical Analysis, with Special Reference to Education, 2nd ed.",
 author = "Gary S. Becker",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "NBER",
 year = "1975",
 URL = "http://www.nber.org/books/beck75-1",
}