Alessandro Piergallini

Monetary Policy and Fiscal Rules

This paper presents a Dynamic New Keynesian model with wealth effects to study the performance of monetary policy under Ricardian and non-Ricardian fiscal regimes. The model is calibrated to euro area quarterly data. The interactions between fiscal policy and interest rate rules have critical implications for equilibrium uniqueness. Within the class of Ricardian fiscal rules, active monetary policies are not necessary for equilibrium determinacy. However, monetary authorities overreacting to inflation not only improve macroeconomic performance, but also generate similar outcomes under different fiscal rules. Conversely, under non-Ricardian fiscal regimes, interest rate pegs are predicted to reduce inflation variability.

Public Debt, Distortionary Taxation, and Monetary Policy

Since Leepers (1991, Journal of Monetary Economics 27, 129-147) seminal paper, an extensive literature has argued that if fiscal policy is passive, i.e., guarantees public debt stabilization irrespectively of the inflation path, monetary policy can independently be committed to inflation targeting. This can be pursued by following the Taylor principle, i.e., responding to upward perturbations in inflation with a more than one-for-one increase in the nominal interest rate. This paper analyzes an optimizing framework in which the government can only finance public expenditures by levying distortionary taxes. It is demonstrated that households market participation constraints and Laffer-type effects can render passive fiscal policies unfeasible. For any given target inflation rate, there exists a threshold level of public debt beyond which monetary policy independence is no longer possible. In such circumstances, the dynamics of public debt can be controlled only by means of higher inflation tax revenues: inflation dynamics in line with the fiscal theory of the price level must take place in order for macroeconomic stability to be guaranteed. Otherwise, to preserve inflation control around the steady state by following the Taylor principle, monetary policy must target a higher inflation rate.

Indicators and Tests of Fiscal Sustainability: An Integrated Approach

This paper shows that indicators and tests of government solvency should not be used alternatively. We present a simple and intuitive procedure to integrate simultaneously the results from the two approaches to fiscal sustainability. An application to U.S. post-World War II data demonstrates the empirical relevance of the proposed strategy. Our results suggest that U.S. fiscal policy is on a sustainable path, since the warning predictions of tax gap indicators merely reflect cyclical factors.

A NOTE ON NONLINEAR FISCAL REGIMES AND INTEREST RATE POLICY

Much empirical evidence finds that governments react to fiscal imbalances in a non-linear way, through an increasing marginal response of primary surpluses to changes in debt. This paper shows that non-linear fiscal regimes alter equilibria under active and passive monetary-fiscal policies. The Fisher equation combined with non-linear fiscal policies leads to multiple steady states. Under passive interest rate rules, even if the steady state at which fiscal policy is active is locally saddle-path stable, there exist infinite equilibrium paths originating in the neighborhood of that steady state which converge into a high-debt trap. Under active interest rate rules, even if the steady state at which fiscal policy is active is locally unstable, there exists a saddle connection with the high debt equilibrium along which inflation is uniquely determined. JEL Classification: E63; E52; E31.

Country‐Specific Risk Premium, Taylor Rules, and Exchange Rates

The adoption of a Taylor-type monetary policy rule and an inflation target for emerging market economies that choose a flexible exchange rate regime is often advocated. This paper investigates the issue of exchange rate determination when interest-rate feedback rules are implemented in a continuous-time optimizing model of a small open economy facing an imperfect global capital market. It is demonstrated that when a risk premium on external debt affects the monetary policy transmission mechanism, the Taylor principle is not a necessary condition for determinacy of equilibrium. On the other hand, it is shown that exchange rate dynamics critically depends on whether monetary policy is active or passive.

Equilibrium Determinacy under Monetary and Fiscal Policies in an Overlapping Generations Model

This paper studies the issue of equilibrium determinacy under monetary and fiscal policy feedback rules in an optimizing general equilibrium model with overlapping generations and flexible prices. It is shown that equilibria may be determinate also when monetary and fiscal policies are both passive. In particular, under passive monetary rules, equilibrium uniqueness is more likely to be verified when fiscal policies are less committed to public debt stabilization. Copyright Banca Monte dei Paschi di Siena SpA, 2005

House prices and monetary policy

Abstract This paper analyzes global dynamics in an overlapping generations general equilibrium model with housing-wealth effects. It demonstrates that monetary policy cannot burst rational bubbles in the housing market. Under monetary policy rules of the Taylor-type, there exist global self-fulfilling paths of house prices along a heteroclinic orbit connecting multiple equilibria. From bifurcation analysis, the orbit features a boom (bust) in house prices when monetary policy is more (less) active. The paper also proves that booms or busts cannot be ruled out by interest-rate feedback rules responding to both inflation and house prices.

Firms’ money demand and monetary policy

Standard New Keynesian models for monetary policy analysis are cashless. When the nominal interest rate is the central banks operating instrument, the LM equation is endogenous and, it is argued, can be ignored. The modern theoretical and quantitative debate on the importance of money for the conduct of monetary policy, however, overlooks firms money demand. Working in an otherwise baseline New Keynesian setup, this paper shows that the monetary policy transmission mechanism is critically affected by the firms money demand choice. Specifically, we prove that equilibrium determinacy may require either an active interest-rate policy (i.e., overreacting to inflation) or a passive interest-rate policy (i.e., underreacting to inflation), depending on the elasticity of production with respect to real money balances. We then calibrate the model to U.S. quarterly data and develop a sensitivity analysis in order to investigate the quantitative implications of our theoretical results. We find that macroeconomic stability is more likely to be guaranteed under an active, although not overly aggressive, monetary-policy stance.

Public Capital Expenditure and Debt Dynamics: Evidence from the EU

This paper investigates the relationship between public capital expenditure and public debt in the European Union (EU) on a panel of fifteen countries in 1980-2013. We find robust evidence of a negative cointegrating relation, whereby increases in the capital expenditure-GDP ratio cause reductions in the long-run debt-GDP ratio. Our empirical results suggest that current EU fiscal austerity can trigger upward debt spirals if cuts in total expenditure disregard its composition. The findings appear to give support to the view, consistent with the «golden rule of public finance», that EU fiscal rules should allow for higher levels of capital expenditure in order to foster debt consolidation through growth dividends.

House Prices and Monetary Policy

This paper analyzes global dynamics in an overlapping generations general equilibrium model with housing-wealth effects. It demonstrates that monetary policy cannot burst rational bubbles in the housing market. Under monetary policy rules of the Taylor-type, there exist global self-fulfilling paths of house prices along a heteroclinic orbit connecting multiple equilibria. From bifurcation analysis, the orbit features a boom (bust) in house prices when monetary policy is more (less) active. The paper also proves that booms or busts cannot be ruled out by interest-rate feedback rules responding to both inflation and house prices.