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Well, actually, from the point of view of I/O models of the economy there's a distinction between whether an advance just changes the productivity/cost coefficients of the model, or changes its dimensionality by adding a new process or a new product.

The difference between the dynamical systems we are used to considering in physics and biological or economic evolution is the possibility of the system of differential/difference equations changing dimensionality in response to processes within the system itself.

We have met the enemy, and he is us — Pogo

by Carrie (migeru at eurotrib dot com) on Fri Feb 22nd, 2008 at 07:30:00 AM EST
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