Identity is a critical concept in the rational interactions of any set of objects involving subject-object relationships. The objects must be distinguished according to some framework in order for such relationships to have meaning. In the world of economic systems, relationships such as...

The Survey of Consumer Finances (SCF) has a dual-frame sample design that supplements a standard area-probability frame with a sample of observations drawn from statistical records derived from tax returns. The tax-based frame is stratified on the basis of a "wealth index" constructed largely...