What variables are constant?

Chris Burford cburford at gn.apc.org
Fri Sep 22 00:03:04 MDT 1995

From: glevy at acnet.pratt.edu
Date: Thu, 21 Sep 1995 01:37:08 -0400 (EDT)
Subject: Re: Chaos is not a "theory"

Steve K wrote:

 The best we can hope for is to uncover the
> salient factors, and leave the rest to "exogenous factors".
And how do you go about determining which variables should be exogenous?
I'll grant you that your preference for Vietnamese pork rolls doesn't
have a significant impact on the trade cycle, but what variables of
import are held constant? I believe that this is a rather significant
question for all economic modelling, no?

Chris B:

The total sum of use values may increase with the increase in

The total amount of currency in circulation may
fluctuate, usually upwards.


the most important variable that remains constant is
the total sum of exchange value created by all the
commodity producing labour in the world.

I would be grateful if everyone will throw everything they
can at this formula, as I  want to clarify whether it
is robust, or it needs amending. It appears to me to be an
inescapable corollary of Marx's economic theory.

Chris B. London.

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