Los puntos clave no están disponibles para este artículo en este momento.
In this article, Nathan Keyfitz analyzes the urbanization of a national population that at first is entirely rural. The population is subjected to fixed rates of natural increase and migration and the evolution of its urban and rural subpopulations is studied by means of a pair of differential equations.
Nathan Keyfitz (Tue,) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: