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AbstractThe global …nancial crisis has led to a revival of the empirical literature on current account imbalances. This paper contributes to that literature by investigating the importance of evaluating model and parameter uncertainty prior to reaching any …rm conclusion. We explore three alternative econometric strategies: examining all models, selecting a few, and combining them all. Out of thousands (or indeed millions) of models a story emerges. Prior to the …nancial crisis, current account positions of major economies such as the US, UK, Japan and China were not aligned with fundamentals. Non-technical summary Prior to 2008 some leading economists warned about the potential risks from current account imbalances in the major economies. The …nancial crisis highlighted the key role of country interlinkages as instability spread from the United States to the rest of the world, though not via the exchange rate channel, as had been expected. Subsequently there has been an important debate on whether current account imbalances are an important factor for emergence of bubbles and the transmission of …nancial crisis internationally.There are di¤erent approaches to assess current account imbalances. The classic theoretical approach to model current accounts is based on an intertemporal optimization. This methodology has been criticized for not being validated empirically. Therefore, the standard intertemporal current account model has been extended in many directions by introducing additional relevant factors that could a¤ect consumptions and savings decisions. Di¤erent models, however, point to di¤erent predictions on the relevant current account determinants. This choice could be arbitrary and in ‡uence the overall assessment.In this paper we show that there are potentially thousands (or even million) of plausible current account models, depending on the choice of fundamentals. We therefore look for robust conclusions following three di¤erent econometric strategies. The …rst consists in examining all possible models and verifying if there are some common features which could be identi…ed across all of them. The second route aims at choosing the best model based on both economic and statistical criteria. A …nal third route considers the information content of all models by applying Bayesian model combination techniques. We explore a particularly simple and appealing approach that is not dependent on any theoretical priors.All three...