摘要:This paper explores alternative theoretical explanations of empirical evidence of increasing regional income inequality in the United States since the mid-1970s. Analysis indicates that conventional regional growth theories, including the neoclassical, export base, cumulative causation, and growth pole theories, explain increasing regional inequality by resorting to exogenous forces. Although each of the theories contains key relationships that provide a partial explanation of unbalanced growth and regional inequality, none of them is complete. The theory of long waves, long used in the study of economic cycles, then is examined. Key relationships contained in each of the regional growth theories are synthesized with the long wave explanation to generate a more complete theory of unbalanced regional growth and an endogenous explanation of increasing regional inequality.