Scedasatic Function

Definition: Given an independent variable x and a dependent variable y, the scedastic function is the conditional variance of y given x. That variance of the conditional distribution is:

var[y|x] = E[(y-E[y|x])²|x]

var[y|x] = integral or sum of (y-E[y|x])²f(y|x) dy

var[y|x] = E[y²|x] - (E[y|x])². (Econterms)

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