Money-Multiplier Shocks

Benati, Luca; Ireland, Peter (August 2017). Money-Multiplier Shocks (Discussion Papers 17-08). Bern: Department of Economics

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Shocks to the M1 multiplier–in particular, shocks to the reserves/deposits ratio–played a key role in driving U.S. macroeconomic fluctuations during the interwar period, but their role in the post-WWII era has been almost uniformly negligible. The only exception are shocks to the currency/deposits ratio, which played a sizeable role for inflation and M1 velocity. By contrast, shocks to the multiplier of the non-M1 component of M2, which had been irrelevant in the interwar period, have played a significant role in driving the nominal side of the economy during the post-WWII period up to the collapse of Lehman Brothers, in particular during the Great Inflation episode. During either period, the multiplier of M2-M1 has been cointegrated with the short rate. The monetary base had exhibited a non-negligible amount of permanent variation during the interwar period, whereas it has been trend-stationary during the post-WWII era. In spite of the important role played by shocks to the multiplier of M2-M1 during the post-WWII period, we still detect a non-negligible role for a nonmonetary permanent inflation shock, which has the natural interpretation of a
disturbance originating from the progressive de-anchoring of inflation expectations which started in the mid-1960s, and their gradual re-anchoring following the beginning of the Volcker disinflation.

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