Alarm, but little action, on population

Article Abstract:

Population growth, like nuclear proliferation, is a global problem whose effects extends beyond the borders of an overpopulated country. However, unlike nuclear proliferation, external coercion by the more developed countries aimed at checking population growth in underdeveloped countries is not effective nor acceptable. A starting point will be the open acknowledgment of the problem. A proposed approach is to require governments receiving external aid to commit themselves to externally monitored programmes of mass education and public health. Concomitant with this should be the relaxation of trade constraints against exports of poorer countries.

Planning, International aspects, Birth control, Demographic transition

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World population

Article Abstract:

The Verhulst's logistic model indicates that the world's human population of 5.48 billion will double in 47 years and eventually will peak at 23.8 billion. The logistic model's close agreement with world and continental population statistics at five-year intervals between 1950 and 1985 show that it is preferable to the malthusian and gompertzian models. Moreover, the malthusian model predicts indefinite population growth while the gompertzian model forecasts the occurrence of saturation in a few thousand years at 1,062 billion people. Both of these results are improbable.

Population forecasting

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Unexpected dominance of high frequencies in chaotic nonlinear population models

Article Abstract:

New studies suggest that power spectral densities of chaotic trajection for the population dynamics of individual species do not display reddened fluctuations but a blue spectra, with increasing power at higher frequencies. This difference of high- and low-frequency variability has been shown through simple discrete-time population models. Although the shapes of the spectra varied from model to model, all displayed a blue spectra of chaotic trajectories for many parameter values.

Population

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