Can European countries share their debts? This column argues that higher government indebtedness means larger household net financial assets. Thus, any pooling of European legacy debt would be considered unacceptable by countries with less government debt unless it also involved the pooling of households’ financial assets. Yet, this would be legally and technically insurmountable. The EU must face forced Ricardian equivalence: the countries with the largest legacy-debt burdens must reduce them by increasing the tax burden or, alternatively, reduce their budget expenditure.

So far, discussions around Europe’s prospective banking union have focused only on the supervision of banks. This column argues that policymakers must also think about the resolution of banks in distress. While national governments confine themselves to the domestic effects of a banking failure, a European Resolution Authority could incorporate domestic and cross-border effects. A cost-benefit analysis of a hypothetical resolution of the top 25 European banks shows that the UK, Spain, Sweden, and the Netherlands would be the main winners.

Policymakers everywhere are concerned about currency wars. Are quantitative easing and managed exchange rates bad for the global economy? This column looks at the hard empirical evidence, arguing that, in fact, Japan is behaving rather responsibly and that other strong economies have themselves benefited from undervalued currencies. That said, it is true that politicians’ short time horizons often lead to stealthy policy and large swings in exchange rates. Economists should therefore aim to promote longer-run cosmopolitan interests rather than shorter-run nationalistic agendas where possible.

The IMF’s role in past systemic banking crises has been hotly debated. Indeed, prominent intellectuals have criticised the Fund for creating or exacerbating crises. This column discusses new evidence showing that IMF lending programmes are in fact associated with a lower probability of banking crises occurring in future.

Can the euro exist without fiscal or political union? This column draws on the history of the US – especially its assumption of states’ debt after the War of Independence – to investigate which path might best serve the Eurozone. History tells us that unions require a well-constitutionalised system of restraint on fiscal behaviour, both at the federal level and at that of individual states.

Why is it that large movements in exchange rates have small effects on international prices? What does this mean for a crisis-stricken Eurozone? Using firm-level data, this column presents new research that investigates this exchange rate ‘disconnect’. Evidence suggests that the prices of the largest firms – with their disproportionately large share of trade – are insulated from exchange rate movements. The international competitiveness effects of a euro devaluation are therefore likely to be modest, given major exporters’ reliance on global supply chains.

Do economists and policymakers know how to design a federal bank for Europe? Is there a template? This column explores the history of the US Federal Reserve, gleaning lessons for the future of the European banking system. Getting to grips with the historical and empirical details shows how different the two really are. Overall, evidence suggests that the mechanism of the TARGET system might well create demand for Europe to move further towards fiscal federalism.

Recent policy and academic debates have begun to influence Eurozone reform. But how sound is the advice we give out? This column argues that calls for a Eurozone or full-fledged EU superstate are overstated. Yes, developing an adequate system of European banking supervision is a matter of urgency if we hope to tackle the threat posed by an overdeveloped and opaque financial system. But calling for a superstate misunderstands the reasons politicians introduced the euro in the first place.

The new year has provided cheer for macroeconomic optimists. This column by Olivier Blanchard, one of the world’s leading economists, argues that important progress has been made in putting the crisis behind us, but that recovery continues to be hampered by the need for fiscal consolidation and a weak financial system.

Eurozone labour markets are under stress. This column explores the connections between labour-market reform and macroeconomic policy, arguing that with its large differences in firing costs, normal Eurozone monetary policy is inappropriate for several Eurozone countries. If the efficacy of the ECB’s policy is impaired because there is no harmonisation of firing costs, tensions will continue to rise within the Eurozone.