Current neoclassical microeconomic theory of rational consumer behavior affirms a unique consumer price-quantity relationship under conditions associated with monopolistic competition. Inverse demand will be just as own-price elastic as demand in the neighborhood of the limit state, while demand...

This paper shows that there are serious problems with matrix inversion of firm-level demand systems. When firms sell differentiated, imperfect substitutes, matrix inversion does not control for the nature of the product when the number of firms is permitted to expand beyond duopoly. Under these...