This analysis addresses the need for including age-structure effects in migration analysis as important for determining effects of a demographic process on an area's socioeconomic characteristics. It examines: (1) patterns of age-specific net migration across age groups for Texas' 254 counties in 1960-1970 and 1970-1980 using cluster analysis and, (2) the alternative and relative effects of total net migration, net migration for 16 separate age groups, and clusters representing different patterns of age-specific net migration across ages on selected economic and socioeconomic characteristics of Texas counties in 1970 and 1980 and on changes in such characteristics during 1960-1970 and 1970-1980. Results are presented in four tables. Tables 1 and 2 show means and standard deviations of each age-specific net migration rate for individual clusters identified for the two time periods and verify the large inmigration to Texas in the 1970's. Tables 3 and 4 show effects of net migration on counties' economic and socioeconomic characteristics. Results indicate there are age-structure effects independent of the effects of either total net migration or migration for individual age groups. Although the ability to predict may be less with clusters, their use may provide greater understanding of effects of the migration process on origin and destination areas. (NEC)