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Mircea Pauca, 
 
Sorry to be so tardy in getting back to you. Perhaps we should move further the discussion
off the HES site. My university email is [log in to unmask]
 
However, in case other might be interested, I will respond briefly to your posting. 
 
>     I have read with interest that 'control theory' can be 
> used as a basis for values or prices ! 
 
In many cases exhanging the algorethm of maximization for a control theory conception of
agency  allows the construction of a system that is close to, but not identical to
standard economic analysis.  But, the control algorethm can also account for some
important anomolous cases such as the Giffen paradox, and the backward bending labor offer
curve.
 
Various versions of control theory could be used, but I mostly use Euler's method plus an
integration term. My goal is a comprehensive redescription of economic analysis in control
theory terms.   The discussions under the caption "cybernetics" are mostly an
embarassment.
 
However, the work of William T. Powers  _Behavior: the Control of Perception_ has been
extremely helpful.
 
Powers work influenced Glasser's book _Stations of the Mind_,  Since then Powers'
influence upon Glasser's work has markedly declined.
 
Bill Williams 
 
 
 
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