In one of the foremost critiques of the widespread view that in market-based economics the fl uctuations of the marketplace are essentially self-regulating, Eli Ginzberg argues the reverse. He asserts that government regulation or intervention to provide stability in the capitalist marketplace is a necessity. In this classic statement of macroeconomic theory, Ginzberg argues that self-directed stable economies, devoid of an appreciation of social and psychological factors, are essentially illusory.