Abstract
Welty in his article on Giffen's Paradox1 expresses De Alessi's Professor condition on the form of individual utility functions ("the absolute value of the deduced income effect is less than the absolute value of the deduced substitution effect in the case of inferior goods"2) as: A = {Sx/SM (i) I take it that Welty's rendering of the income effect is a slip. A is in any case not consistent with Slutsky's equation. Traditional consumer's demand theory states : TT /*x *x *x ' o / 8x '
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