• Nathan Keyfitz
Part of the Springer Texts in Statistics book series (STS)


Physics accounts for heat by the motion of molecules, medicine accounts for disease by the action of germs, economics accounts for aggregate prices and production by the activities of individuals seeking to maximize their utility. The fact that nontrivial problems of aggregation arise, and that the microelements often turn out on closer examination to be unrealistic constructions, does not deprive them of explanatory and predictive value.


Unprotected Intercourse Fertile Woman Natural Fertility Fertile Period Parity Progression 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer Science+Business Media New York 1985

Authors and Affiliations

  • Nathan Keyfitz
    • 1
  1. 1.IIASALaxenburgAustria

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