The demand curve for these entities becomes nearly horizontal near the equilibrium of the floor model, unlike in the corridor model. The demand curve for these entities is a downward-sloping logistic curve with bounds of i-sub-r and i-sub-b, which intersects their vertical supply curve. A simple expression for the money multiplier is the reciprocal of a ratio named for these entities, (-5[1])whose excess sometimes (15[1])has a negative interest rate to encourage lending. (*) Open market operations traditionally (-5[1])change the quantity of these entities, which is often graphed against the interest rate. A minimum requirement for the size of (10[1])these entities, often expressed as a percentage of liabilities, forms (10[1])a system named for their “fractional” variety. For 10 points, name these deposits (-5[1])made by (10[1])banks to the central bank. ■END■ (0[3])