Over the past 20 years, Portugal has gone through a boom, a slump, a sudden stop, and now a timid recovery. Unemployment has decreased, but remains high, and output is still far below potential. Competitiveness has improved, but more is needed to keep the current account in check as the economy...

Blanchard develops four main arguments concerning the costs of public debt when safe interest rates are low.First, the current US situation in which safe interest rates are expected to remain below growth rates for a long time is more the historical norm than the exception. If the future is like...

We explore two issues triggered by the global financial crisis. First, in most advanced countries, output remains far below the pre-recession trend, suggesting hysteresis. Second, while inflation has decreased, it has decreased less than anticipated, suggesting a breakdown of the relation...

Many emerging-market economies have relied on foreign exchange intervention (FXI) in response to gross capital inflows. In this paper, we study whether FXI has been an effective tool to dampen the effects of these inflows on the exchange rate. To deal with endogeneity issues, we look at the...

The workhorse open-economy macro model suggests that capital inflows are contractionary because they appreciate the currency and reduce net exports. Emerging-market policymakers however believe that inflows lead to credit booms and rising output, and the evidence appears to go their way. To...

Fifty years ago, Milton Friedman articulated the natural rate hypothesis. It was composed of two sub-hypotheses: First, the natural rate of unemployment is independent of monetary policy. Second, there is no long-run tradeoff between the deviation of unemployment from the natural rate and...

Debt sustainability is fundamentally a probabilistic concept: Debt is rarely sustainable with probability one. We propose an index of external debt sustainability that reflects this uncertainty. Namely we construct the index as the probability that, at the current exchange rate, net external...

The strong monetary policy actions undertaken by advanced economies' central banks have led to complaints of "currency wars" by some emerging-market economies and to widespread demands for more macroeconomic policy coordination. This paper reviews cross-border effects of advanced economies'...

The European Union’s fiscal rules have been suspended until at least the end of 2021. When they are reinstated, they will need to be modified, if only because of the high levels of debt. Proposals have been made—and more are to come—suggesting various changes and simplifications. In this...

Climate change poses an existential threat. The authors argue that carbon pricing and green research and development (R&D) support are good economics, but their implementation can be improved. Even if carbon prices are generalized and given more substance, green R&D is still likely to be smaller...