Wonkish

A reference to Moving Equilibrium taken from the Economist View comments.

It states that a varying signal can be approximated by a reduced dimensional system within a certain error  band.  Thus, we do not need infinite division of the y scale to approximate the range of y.  This comes into play with Marshall temporary equilibrium.  What it all comes down to, if you cannot get the perfect trade this month, you can get a trade good enough, then refine the trade over the weeks.  This is spectral decomposition, this is what beavers and humans do in the production line.  It is the time dependent portion of a Levine production chain, it is a Huffman encoder.  This math allows us to treat the economy as a series of distribution networks.

Moving Equilibrium is similar to the Jensen Inequality,  which tells us when  we can perfomr an operation on the mean of an ensemble and get a close result to performing the operation on all members of the ensemble.  For example, when being a carpenter, one can estimate the future by looking at the average carpenter.  So, when Jensen holds, carpenters are better off portraying themselves as carpenters.  But when things break down, they are better off being handymen.