This paper identifies and examines industrial and occupational changes that have accompanied population growth in Texas. According to the 1960 U.S. Census definitions for county size, Texas counties were grouped as metropolitan, urban-nonrnetropolitan, and rural-nonmetropolitan. Employment in 13 industrial and 9 occupational categories was used to measure sustenance differentiation. Industrial employment (SDI) diversified in both the sixties and seventies as nonrnetropolitan counties became more structurally homogeneous. Occupational employment (SDO) decreased in operative, labor, and farmer-farm worker jobs and increased in sales, crafts, clerical, and professional-technical-kindred jobs. Additionally, in 1980 SDI and SDO were markedly less correlated than in previous years, suggesting a change in previous structural relationships between industry and occupation. Migration rates were much more highly correlated with SDI than with SDO over the 20 years.

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