Delineation and Constancy of the Middle Classes

Perceived social classes and assignment of middle-class occupations to
one of the population classes.

Topics: Reading habits; preferred radio broadcasts; social mobility.
Indices: prosperity, class and class identification.

Demography: age (classified); sex; marital status; number of children;
school education; vocational training; occupation; professional
position; employment; income; household income; size of household;
composition of household; head of household; self-assessment of social
class; social origins; state; possession of durable economic goods.

Interviewer rating: social class of respondent; city size.