scholarly journals Monetary Policy and Bubbles in a New Keynesian Model with Overlapping Generations

2021 ◽  
Vol 13 (2) ◽  
pp. 121-167
Author(s):  
Jordi Galí
Keyword(s):  
Monetary Policy ◽  
Rational Expectations ◽  
Overlapping Generations ◽  
Asset Price ◽  
New Keynesian ◽  
New Keynesian Model ◽  
Asset Price Bubbles ◽  
Price Bubbles ◽  
Keynesian Model ◽  
Welfare Implications

I analyze an extension of the New Keynesian model that features overlapping generations of finitely lived agents and (stochastic) transitions to inactivity. In contrast with the standard model, the proposed framework allows for the existence of rational expectations equilibria with asset price bubbles. I study the conditions under which bubble-driven fluctuations may emerge and the type of monetary policy rules that may prevent them. I conclude by discussing some of the model’s welfare implications. (JEL E12, E32, E44, E52, E63)

ARE MAJOR CENTRAL BANKS BLINDED BY THE ANALYTICAL ELEGANCE OF THEIR MODELS? POSSIBLE COSTS OF UNCONVENTIONAL MONETARY POLICY MEASURES

2017 ◽  
Vol 62 (01) ◽  
pp. 87-108 ◽  
Author(s):  
PIOTR CIŻKOWICZ ◽  
ANDRZEJ RZOŃCAZ
Keyword(s):  
Monetary Policy ◽  
Global Financial Crisis ◽  
Significant Risk ◽  
Central Banks ◽  
New Keynesian ◽  
New Keynesian Model ◽  
Unconventional Monetary Policy ◽  
Keynesian Model ◽  
Policy Measures ◽  
The Global Financial Crisis

We survey the possible costs of the unconventional monetary policy measures undertaken by major central banks after the outbreak of the global financial crisis in 2008. We argue that these costs are not easily discernable in the new Keynesian (NK) model, which defines a theoretical framework for monetary policy. First, the costs may result from the effects of unconventional monetary policy measures on the intensity of restructuring and the persistence of uncertainty (which increased after the outbreak of the crisis). However, neither of these processes is considered in the new Keynesian model. Second, costs may be generated not only by distortions in the choices made by economic agents but may also be a result of the decisions made by governments, particularly in terms of the fiscal deficit level. However, the new Keynesian model does not consider the effects of unconventional monetary policy measures on the quality of fiscal policy. Without carefully considering the costs, there is a significant risk that unconventional monetary policy measures could become a conventional response to recurrent crises.

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