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. Author manuscript; available in PMC: 2013 Feb 1.
Published in final edited form as: Popul Dev Rev. 2010;36(2):283–307. doi: 10.1111/j.1728-4457.2010.00330.x

FIGURE 1. Logistic model of fertility transition applied to microregions in Brazil.

FIGURE 1

NOTE: Starting from a pretransition level Fpre, TFR declines toward a new level Fpost. Times t10, θ, and t90 are the points at which the transition is 10 percent, 50 percent, and 90 percent complete. Duration = t90–t10. (Curve as drawn shows a stylized transition in TFR from 6.5 to 1.9, centered around 1982.)