Monetary Policy for a Bubbly World

53 Pages Posted: 20 Sep 2016

See all articles by Vladimir Asriyan

Vladimir Asriyan

CREI; Barcelona GSE; Universitat Pompeu Fabra; Centre for Economic Policy Research (CEPR)

Luca Fornaro

Universitat Pompeu Fabra - Centre de Recerca en Economia Internacional (CREI); Barcelona Graduate School of Economics (Barcelona GSE)

Alberto Martin

Universitat Pompeu Fabra - Centre de Recerca en Economia Internacional (CREI); Centre for Economic Policy Research (CEPR)

Jaume Ventura

Universitat Pompeu Fabra - Centre de Recerca en Economia Internacional (CREI)

Multiple version iconThere are 3 versions of this paper

Date Written: September 2016

Abstract

We propose a model of money, credit and bubbles, and use it to study the role of monetary policy in managing asset bubbles. In this model, bubbles pop up and burst, generating fluctuations in credit, investment and output. Two key insights emerge from the analysis. First, the growth rate of bubbles, which is driven by agents’ expectations, can be set in real or in nominal terms. This gives rise to a novel channel of monetary policy, as changes in the inflation rate affect the real growth rate of bubbles and their effect on economic activity. Crucially, this channel does not rely on contract incompleteness or price rigidities. Second, there is a natural limit on monetary policy’s ability to control bubbles: the zero-lower bound. When a bubble crashes, the economy may enter into a liquidity trap, a regime in which agents shift their portfolios away from bubbles - and the credit that they sustain - to money, reducing intermediation, investment and growth. We explore the implications of the model for the conduct of “conventional” and “unconventional” monetary policy, and we use the model to provide a broad interpretation of salient macroeconomic facts of the last two decades.

Suggested Citation

Asriyan, Vladimir and Fornaro, Luca and Martin, Alberto and Ventura, Jaume, Monetary Policy for a Bubbly World (September 2016). NBER Working Paper No. w22639, Available at SSRN: https://ssrn.com/abstract=2840587

Vladimir Asriyan (Contact Author)

CREI ( email )

Ramon Trias Fargas, 25-27
Barcelona, 08005
Spain

HOME PAGE: http://crei.cat/people/asriyan/welcome.html

Barcelona GSE ( email )

Ramon Trias Fargas, 25-27
Barcelona, Barcelona 08005
Spain

HOME PAGE: http://www.barcelonagse.eu/Faculty.php?id=510

Universitat Pompeu Fabra ( email )

Ramon Trias Fargas, 25-27
Barcelona, E-08005
Spain

HOME PAGE: http://www.econ.upf.edu/en/people/onefaculty.php?id=p7040

Centre for Economic Policy Research (CEPR) ( email )

London
United Kingdom

Luca Fornaro

Universitat Pompeu Fabra - Centre de Recerca en Economia Internacional (CREI) ( email )

Ramon Trias Fargas, 25-27
Barcelona, 08005
Spain

Barcelona Graduate School of Economics (Barcelona GSE) ( email )

Ramon Trias Fargas, 25-27
Barcelona, Barcelona 08005
Spain

Alberto Martin

Universitat Pompeu Fabra - Centre de Recerca en Economia Internacional (CREI) ( email )

Ramon Trias Fargas, 25-27
Barcelona, 08005
Spain

Centre for Economic Policy Research (CEPR) ( email )

London
United Kingdom

Jaume Ventura

Universitat Pompeu Fabra - Centre de Recerca en Economia Internacional (CREI) ( email )

Ramon Trias Fargas, 25-27
Barcelona, 08005
Spain

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