In a major work that is the culmination of over a decade of intensive research, Werner Hildenbrand presents a new theory of market demand, the principal aim of which is to identify the conditions under which the Law of Demand holds true. Hildenbrand argues that the Law of Demand is due mainly to the "heterogeneity" of the population of households. In his view, "rationality" of individual behavior plays only a minor role. While the traditional approach...