Under what circumstances would you expect income to be a better predictor of consumer behavior than a composite measure of social class (e.g., based on income, education, and occupation)? When would you expect the composite social class measure to be superior?

Under what circumstances would you expect income to be a better predictor of consumer behavior than a composite measure of social class (e.g., based on income, education, and occupation)? When would you expect the composite social class measure to be superior?