On the Time Required for Conception

  • David P. Smith
  • Nathan Keyfitz
Part of the Demographic Research Monographs book series (DEMOGRAPHIC)


We omit the appendix, and sections of the paper discussing correlations between two successive conception delays and numerical results. (The maximum likelihood estimates for the mean and variance of fecundability, developed in the appendix, are the \(\bar{p}(1+c^{2})\)and VP given in our introduction to Henry, paper 41 above.)


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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • David P. Smith
    • 1
  • Nathan Keyfitz
    • 2
  1. 1.Harvard UniversityCambridgeUSA
  2. 2.Department of SociologyHarvard UniversityCambridgeUSA

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