Summary statistics data from Wheaton, B., Muthen B., Alwin, D.,           & Summers, G., 1977, "Assessing reliability and stability in           panel models", in D. R. Heise (Ed.), _Sociological Methodology           1977_ (pp. 84-136), San Francisco: Jossey-Bass, Inc.
Intended use: Create structural model relating Alienation in 1971, Alienation in 1967, and SES in 1966.
Four indicators each measured in 1966, 1967, and 1981, plus another indicator (educ66) measured only in 1966.