market operations of the Federal Reserve, and their effects on interest rates and the quantities of financial goods. Chapter 2 reveals that previous work on the estimation of bank tech­ nologies is incomplete, and that the regulations require modelling as a part of the profit maximizing structure. 1.3 User Cost Derivation Chapter 3 discusses the construction of user costs. These are derived for the services from all assets or liabilities on a bank balance sheet or appearing on the income statement. The user cost formulation permits goods to be classified as outputs and inputs. Those with a positive user cost, where expenditures per unit exceed revenues per unit, are inputs. The unit for financial goods such as loans or deposits is one dollar per period. Goods with a negative user cost, with expenditures falling below revenue per unit, are outputs.