Talk:Arc elasticity

Simplification?
What's wrong with simply:

$$E_{x,y} = \frac{\Delta x}{\Delta y}\cdot\frac{\Sigma y}{\Sigma x}$$?

It's an elementary algebraic simplification, though most Economics sources I've looked at insist on using the convoluted definition and not showing how it can be siplified...

Tebello TheWHAT!!?? 07:13, 25 August 2010 (UTC)


 * I don't see how that simplification helps. It uses the $$\Delta$$ and $$\Sigma$$ symbols instead of writing out the arithmetic, but the sigma could easily be misleading, and the delta it a notation thing which doesn't really simplify. Otherwise it seems to obscure what's really going on rather than clarify. C RETOG 8(t/c) 13:48, 25 August 2010 (UTC)