... facilities in monetary policy operations. Second,the optimal width should not only be an empirical problem, but it is also a theoretical, normative one:only if one understands precisely the economic ... conditionsbefore the realization of autonomous factor shocks are a priori balanced, the unconditional interest rate(2) equals the central bank s target12iB. Conditional on the realization of η1, (2) ... session on the basis of banks’ expectations regardingtheir end-of-day liquidity positions. Hence, as long as the distribution of the second autonomous factorshock is symmetric, expactations...