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Working papers set out research in progress by our staff, with the aim of encouraging comments and debate.
Published on 27 April 2000
Working Paper no. 111
ByWillem H Buiter and Nikolaos Panigirtzoglou
An economy is in a liquidity trap when monetary policy cannot influence either real or nominal variables of interest. A necessary condition for this is that the short nominal interest rate is constrained by its lower bound, typically zero. The paper develops a small analytical model to show how an economy can get into a liquidity trap, how it can avoid getting into one and how it can get out. We also consider the empirical likelihood of the UK economy hitting the zero nominal rate bound, by investigating the relationship between the level of the short nominal interest rate and its volatility. The empirical evidence on this issue is mixed. To reduce the risk of falling into a liquidity trap, the authorities have two options. The first is to raise the inflation target. The second is to lower the zero nominal interest rate floor. This second option involves paying negative interest on government ‘bearer bonds’ - coin and currency - ie ‘taxing money’, as advocated by Gesell. Once in a liquidity trap, there are two means of escape. The first is to use expansionary fiscal policy. The second is, again, to lower the zero nominal interest rate floor. There are likely to be significant shoe leather costs associated with any scheme to tax currency.
Liquidity traps: how to avoid them and how to escape them
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