Monday, October 17, 2011

Policy is all about Dynamics

What if adjustment speeds of two related prices
Maybe one a stock price and the other a flow price don't sync up well?


Possible catastrophe and sure pareto inefficiency

Take relative national price level change
Versus forex adjustment
In most models that are comp stat models
These two only seem to synchronize
Because there really is no time line

It's a false simultaneity
That once you start setting the variables into time path create all sorts
Of unusual possible future histories
Yup just make everything a function of time and every function of time different and ....


The Paradox of comp stat u might call it

A very misleading paradox indeed
Adystem that operates in time
Modeled by a mechanism
That is without a time dimension

Add in the quantity versus price adjustment "lags" and .....


In fact what really
Gets captured by a point in time steady state calculation ?

Or with parameter settings changed by policy moves
at that point of time

Just what is the info content of such a "recalculation"?

Better perhaps to just work the policy levers
and respond to the changes in system state and specific array of conditions
By fast data systems backing up further working of the levers