I will send some stuff on Structural Graphics in reply.
For the economists on this LO list, take a look at page 134 of "The
Collected Works of F. A. Hayek, Vol. 9, "Contra Keynes and Cambridge", to
see what conceivably was Hayek's only attempt to use a kind of
digraph-like structure to explain something. What he was trying to
explain with this graphic he titled "Diagrammatic Version of Mr. Keynes'
Theory of the Circulation of Money".
Can you imagine how far economics could get if their Nobelity could become
competent in the use of Structural Graphics in lieu of ad-hoc graphics or,
in lieu of any graphics whatsoever.
The Flaming Gadfly
-- John N. Warfield Johnwfield@aol.com