Monetary Policy, Asset-Price Bubbles and the Zero Lower Bound / Tim Robinson, Andrew Stone.

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Robinson, Tim

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Material type: Text

TextSeries: Working Paper Series (National Bureau of Economic Research) ; no. w11105.Publication details: Cambridge, Mass. National Bureau of Economic Research 2005.Description: 1 online resource: illustrations (black and white)Subject(s):

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Abstract: We use a simple model of a closed economy to study the recommendations of monetary policy-makers, attempting to respond optimally to an asset-price bubble whose stochastic properties they understand. We focus on the impact which the zero lower bound (ZLB) on nominal interest rates has on the recommendations of such policy-makers. For a given target inflation rate, we identify several different forms of `insurance' which policy-makers could potentially take out against encountering the ZLB due to the future bursting of a bubble. Even with perfect knowledge of the bubble process, however, which of these will be optimal varies from one type of bubble to another and, for certain bubbles, from one period to the next. It is therefore difficult to say whether the ZLB should cause policy-makers to operate policy more tightly or loosely than they would otherwise do, while a bubble is growing -- even after abstracting from the informational difficulties they face in practice. We also examine the implications of the ZLB for policy-makers' preferences as to their inflation target. Policy-makers who wish to avoid concerns about the ZLB should take care not to set too low a target -- especially if the neutral real interest rate is low.

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Item type	Home library	Collection	Call number	Status	Date due	Barcode	Item holds
Working Paper	Biblioteca Digital	Colección NBER	nber w11105 (Browse shelf(Opens below))	Not For Loan

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February 2005.

We use a simple model of a closed economy to study the recommendations of monetary policy-makers, attempting to respond optimally to an asset-price bubble whose stochastic properties they understand. We focus on the impact which the zero lower bound (ZLB) on nominal interest rates has on the recommendations of such policy-makers. For a given target inflation rate, we identify several different forms of `insurance' which policy-makers could potentially take out against encountering the ZLB due to the future bursting of a bubble. Even with perfect knowledge of the bubble process, however, which of these will be optimal varies from one type of bubble to another and, for certain bubbles, from one period to the next. It is therefore difficult to say whether the ZLB should cause policy-makers to operate policy more tightly or loosely than they would otherwise do, while a bubble is growing -- even after abstracting from the informational difficulties they face in practice. We also examine the implications of the ZLB for policy-makers' preferences as to their inflation target. Policy-makers who wish to avoid concerns about the ZLB should take care not to set too low a target -- especially if the neutral real interest rate is low.