Consumer credit is an extremely significant factor in the economic expansion of the United States. Its annual compound rate of growth over the postwar period, averaging more than 15 percent, has considerably exceeded that of virtually all other economic indicators, and this expansion rate shows no sign of lessening. The importance of consumer credit is further emphasized by the fact that it accounts for nearly one-third the total liabilities of the household sector [11, p. 142]. And from the stand-point of financial institutions, consumer loans are vital because they are characteristically the most profitable investments in lenders' asset portfolios.