Poplulation is typically modeled as a "sigmoid" curve, IE:
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(Use your imagination to make the corners smoother)
For the first half of the curve, the growth looks exponential. I fear
that we have passed this point, and are nearing the linear part of the
curve. For example, the "doubles every week" rule of thumb hasn't held for
the past few days.
I suspect that the growth could be modeled by a modified sigmoid with
a linear component, IE
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In other words, we've seen the exponential growth portion already, now
we will slowly (but steadily) grow.
It will be interesting to see how these predictions turn out.
-- Mike Gebis gebis@ecn.purdue.edu mgebis@eternal.net