A Systemic Demographic Efficiency Analysis of U.S. Interstate Population Exchange, 1935-1980
研究了1935至1980年美国各州间人口迁移的补偿与非补偿性质，利用人口效率指标和Q分析技术揭示了系统性的地理模式变化，反映了后工业时代的经济社会趋势。
"Evolving patterns of population redistribution within the United States are examined for the period 1935 to 1980. The demographic efficiency measure is employed to assess the compensating or non-compensating nature of migration to and from each state. This measure is then extended in order to examine the entire system of state-to-state movement streams. Using the analytical technique of Q-analysis, systemic change is shown to have taken place. It is argued that the geographic pattern change reflects a nexus of economic and societal trends associated with post-industrialism."