Sonnenschein, Hugo; Shafer, Wayne (1982). «Market demand and excess demand functions». In Arrow, Kenneth J.; Intriligator, Michael D. (eds.). Handbook of Mathematical Economics. Vol. 2. էջեր 671–672. «The importance of the above results is clear: strong restrictions are needed in order to justify the hypothesis that a market demand function has the characteristics of a consumer demand function. Only in special cases can an economy be expected to act as an 'idealized consumer.' The utility hypothesis tells us nothing about market demand unless it is augmented by additional requirements.»
