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The paper focuses on the estimation of the euro area output gap. We construct model-averaged measures of the output gap in order to cope with both model uncertainty and parameter instability that are inherent to trend-cycle decomposition models of GDP. We first estimate nine models of trend-cycle decomposition of euro area GDP, both univariate and multivariate, some of them allowing for changes in the slope of trend GDP and/or its error variance using Markov-switching specifications, or including a Phillips curve. We then pool the estimates using three weighting schemes. We compute both ex-post and real-time estimates to check the stability of the estimates to GDP revisions. We finally run a forecasting experiment to evaluate the predictive power of the output gap for inflation in the euro area. We find evidence of changes in trend growth around the recessions. We also find support for model averaging techniques in order to improve the reliability of the potential output estimates in real time. Our measures help forecasting inflation over most of our evaluation sample (2001-2010) but fail dramatically over the last recession.

In this paper, we examine the macroeconomic effects of alternative fiscal consolidation policies in the New Area-Wide Model (NAWM), a two-country open-economy model of the euro area developed at the European Central Bank (cf. Coenen et al., 2007). We model fiscal consolidation as a permanent reduction in the targeted government debt-to-output ratio and analyse both expenditure and revenue-based policies that are implemented by means of simple fiscal feedback rules. We find that fiscal consolidation has positive long-run effects on key macroeconomic aggregates such as output and consumption, notably when the resulting improvement in the budgetary position is used to lower distortionary taxes. At the same time, fiscal consolidation gives rise to noticeable short-run adjustment costs in contrast to what the literature on expansionary fiscal consolidations suggests. Moreover, depending on the fiscal instrument used, fiscal consolidation may have pronounced distributional effects.

Estimates of cyclically-adjusted budget balances, correcting actual government budget balances for business cycle fluctuations, are produced by many institutions, including the European Commission, the IMF and the OECD. This paper presents an alternative approach for the cyclical adjustment of budget balances. The approach is based on a disaggregated method for the calculation of the cyclical component of the budget balance. In this approach, the effects of changes in the structure of demand and national income on government revenue and expenditure are captured. Cases where the various macroeconomic bases are in different phases of the cycle or exhibit fluctuations of different magnitude are taken into account in this way. The computation of the cyclical components of these macroeconomic bases is based on the Hodrick-Prescott filter and takes into account the latest evidence presented in the literature about the properties of this filter. The paper also presents new estimates of the elasticities of individual budget items with respect to the relevant macroeconomic variables. The method is used within the ESCB for the estimation of cyclically adjusted budget balances of the EU countries