Rogers, C.2012-08-092012-08-092011Journal of Money, Credit and Banking, 2011; 43(2-3):553-5630022-28791538-4616http://hdl.handle.net/2440/72440Woodford claims to present a cashless and frictionless model of the channel system of interest rate control. This note explains why Woodford’s frictionless model omits an essential feature of channel systems: the need for clearing e-cash balances at the central bank. Without the existence of some form of final settlement on the books of the central bank channel systems collapse. Woodford makes this conceptual error because he assumes that moneyless accounting systems of exchange can be applied to model e-cash economies.en© 2011 The Ohio State UniversityCashlessfrictionlesse-cashaccounting systems of exchangechannel systemJournal article002010573710.1111/j.1538-4616.2010.00385.x0002887052000132-s2.0-7995301168831024