Originally posted 17 November 2007, this Vox column is more relevant than ever arguing that adopting the euro is effectively irreversible. Leaving would require lengthy preparations, which, given the anticipated devaluation, would trigger the mother of all financial crises. National households and firms would shift deposits to other Eurozone banks producing a system-wide bank run. Investors, trying to escape, would create a bond-market crisis. Here is what the train wreck would look like.

Official statistics for US high school graduation rates mask a growing educational divide. This column presents research showing that a record number of Americans are going to university – while an increasing number are dropping out of high school. This poses major social challenges for the United States.

Most of Africa spent two generations under colonial rule. This column argues that, contrary to some recent commentaries highlighting the benefits of colonialism, it is this intense experience that has significantly retarded economic development across the continent. Relative to any plausible counterfactual, Africa is poorer today than it would have been had colonialism not occurred.

A recent ECB household-wealth survey was interpreted by the media as evidence that poor Germans shouldn’t have to pay for southern Europe. This column takes a look at the numbers. Whilst it’s true that median German households are poor compared to their southern European counterparts, Germany itself is wealthy. Importantly, this wealth is very unequally distributed, but the issue of unequal distribution doesn’t feature much in the press. The debate in Germany creates an inaccurate perception among less wealthy Germans that transfers are unfair.

Slavery, according to historical accounts, played an important role in Africa’s underdevelopment. It fostered ethnic fractionalisation and undermined effective states. The largest numbers of slaves were taken from areas that were the most underdeveloped politically at the end of the 19th century and are the most ethnically fragmented today. Recent research suggests that without the slave trades, 72% of Africa’s income gap with the rest of the world would not exist today.

The 'Scramble for Africa' – the artificial drawing of African political boundaries among European powers in the end of the 19th century – led to the partitioning of several ethnicities across newly created African states. This columns shows that partitioned ethnic groups have suffered significantly longer and more devastating civil wars. It also uncovers substantial spillovers as ethnic conflict spreads from the historical homeland of groups partitioned to nearby areas where non-split ethnicities reside.

The European economy is in its deepest recession since the 1930s. This column says that swift policy response avoided a financial meltdown, but turning the ongoing recovery into sustained growth requires action on five challenges: boosting potential output, enhancing labour market flexibility, preparing fiscal consolidation, facilitating intra-EU adjustment, and unwinding global imbalances. Europe also needs an improved crisis-management framework, lest this happen again.

The effects of of globalisation on income distributions in rich countries have been studied extensively. This column takes a different approach by looking at developments in global incomes from 1988 to 2008. Large real income gains have been made by people around the median of the global income distribution and by those in the global top 1%.  However, there has been an absence of real income growth for people around the 80-85th percentiles of the global distribution, a group consisting of people in ‘old rich’ OECD countries who are in the lower halves of their countries’ income distributions.

The house and equity price busts on top of a credit crunch make this an unprecedented crisis for the modern US economy; its real economy effects are thus difficult to assess. This column provides insights based on evidence from 122 recessions in 21 advanced nations since 1960. Findings suggest recessions in such circumstances are much costlier and slightly longer. But the outcome can be affected by policy, and it’s high time that policymakers act swiftly and decisively.

World poverty is falling. This column presents new estimates of the world’s income distribution and suggests that world poverty is disappearing faster than previously thought. From 1970 to 2006, poverty fell by 86% in South Asia, 73% in Latin America, 39% in the Middle East, and 20% in Africa. Barring a catastrophe, there will never be more than a billion people in poverty in the future history of the world.

We may just have started to feel the pain. Asset price drops – including housing – are common markers in all the big banking crises over the past 30 years. GDP declines after such crises were both large (-2% on average) and protracted (2 years to return to trend); in the 5 biggest crises, the numbers were -5% and 3 years. This column, based on the author’s testimony to the Congress, picks through the causes and consequences. It argues that when it comes to ‘cures,’ it would be far better to get the job done right than get the job done quickly.

The swift policy response to the recent financial crisis helped the world economy avoid a replay of the Great Depression of 1929-32. But can we avoid a replay of 1937-38? With the world economy weakening once again, this column addresses the question with a renewed urgency and comes up with an oft-overlooked explanation – the Treasury Department's decision to sterilise all gold inflows starting in December 1936.

One of the world’s leading international economists explains how the euro could surpass the dollar as the premier international currency and examines the geopolitical implications of such a shift.

More than one billion adults across the globe are overweight, and at least 300 million are clinically obese. This column argues that the obesity epidemic in the US has been creeping up throughout the twentieth century, much earlier than the official account acknowledges. Current US standards thereby mislead many overweight and obese youth into believing that their weight is normal when it is not.

What is the connection between China’s one-child policy and its savings glut? This column provides a pioneering explanation. China’s surplus of men has produced a highly competitive marriage market, driving up China’s savings rate and, therefore, global imbalances.

Without rapid and coordinated action by G7/8 leaders, this financial crisis could turn into a jobs crisis, a pension crisis and much more. This column introduces a collection of essays by leading economists on what the G7/8 leaders should do this weekend. The dozen essays present a remarkable consensus on a few points: we need immediate, coordinated global action that includes recapitalisation of the banks.

There is one important source of information on the effectiveness of monetary and fiscal stimulus in an environment of near-zero interest rates, dysfunctional banking systems and heightened risk aversion that has not been fully exploited: the 1930s. This column gathers data on growth, budgets and central bank policy rates for 27 countries covering the period 1925-39 and shows that where fiscal policy was tried, it was effective.

Greedy bankers are getting most of the blame for the current financial crisis. This column explains bankers did behave badly for mainly three reasons. They committed cognitive errors involving biases towards their own prior beliefs; too many male bankers high on testosterone took too much risk, and a flawed compensation structure rewarded perceived short-term competency rather than long-run results.

Attitudes to sex have changed dramatically over the last hundred years. This column presents a model where socialisation – the passing on of norms and ideologies by parents and institutions such as the church or state – is determined by the technological environment in which people live. Contraception has reduced the chance of unwanted pregnancies from premarital sex, and this in turn has changed social attitudes.

In the first half of 2008, Buiter and Sibert were invited to study Iceland’s financial problems. They identified the “vulnerable quartet” of (1) a small country with (2) a large banking sector, (3) its own currency and (4) limited fiscal capacity – a quartet that meant Iceland’s banking model was not viable. How right they were. This column summarises the report, which is now available as CEPR Policy Insight No. 26 with an October 2008 update.

This is a once-in-a-lifetime crisis. Trust among financial institutions is disappearing; fear may spread. Last week’s US experience showed that saving one bank at a time won’t work. A systemic response is needed and in Europe this means an EU-led initiative to recapitalise the banking sector. Unless European leaders immediately unite to address this crisis before it spirals out of control, they may find themselves fighting over how best to salvage the aftermath.

How much stimulus does spending provide? This column says that fiscal multipliers are much weaker in countries that have high debt, lower income, flexible exchange rates, and greater international openness. Policymakers should consider these characteristics when evaluating the benefits of any fiscal stimulus package.

Here are the basic how's and why's of what the Fed has been doing to calm financial markets.

With the advanced economies at a critical juncture, some economists are urging more fiscal stimulus while others argue that raising debt levels will stunt growth. This column presents the Reinhart-Rogoff findings on the relationship between debt and growth based on data from 44 countries over 200 years with a focus on the debt-growth link during high-debt episodes.