[freemint]

The last time i did a similar fit with world GDP between 1920ish and now it came out as O(x^a) where a was between 4 and 5. Actually i fitted the ODE dx/dt = \beta*x^\alpha to data, the fitted looked nice. I wish i wrote a blog post about it.

[brandmeyer]

There's an old joke that all growth looks exponential when plotted on log-log paper with a fat marker.