The document discusses alternative theories of pricing behavior compared to conventional neoclassical microeconomic theory. It notes that empirical studies show most firms have stable or falling marginal costs, set prices infrequently, have inelastic demand, and are large relative to their industries. Alternative models of pricing focus on uncertainty, product differentiation, and excess capacity as constraints rather than marginal costs. Post-Keynesian and Sraffian theories argue prices are "administered" through markups over costs rather than set by demand, with prices changing less often in manufactured goods industries.