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Maybe Draghi’s policies can buy time for deeper “structural changes” in the periphery, although quite what those are and what difference they would make in the near term remains elusive

More likely, a shift in ECB policies would make the European situation uglier. For one, Draghi would essentially be conceding fiscal dominance, demonstrating that if governments run budget deficits, they can count on the central bank to finance them.

Perhaps Draghi is planning the same game with fiscal authorities that the Banca d’Italia used to play with Italian politicians in the 1980s and early 1990s -- keep interest rates low enough to prevent fiscal collapse, yet high enough to keep fiscal prudence as a priority. Make no mistake about it, inflation or not, this is a strategy of high real interest rates.

Had the ECB operated from the outset under a rule prohibiting it from accepting SGP-noncompliant countries’ debt as collateral, the entire eurozone sovereign-debt problem might have been avoided.

the expansion in the US took place at the federal level, where spending today amounts to 24% of GDP, compared to just 1.2% of GDP for the European Union budget.

The point is that the enforcement mechanism would be truly automatic: market interest rates would provide the discipline that bureaucrats in Brussels cannot.

Of course, the eurozone cannot establish a blue-bond regime without first solving the problems of debt overhang and troubled banks. Otherwise, the plan itself would be destabilizing, because almost all countries would immediately be in the red.

Today, a fifth of U.S. energy consumption is fueled by coal, mainly from Appalachia and the West, a long-term energy source that has provided jobs for millions, a century-old way of life

Roughly speaking, burning coal produces twice as much carbon dioxide as burning the equivalent amount of natural gas. Almost all domestic coal is used to generate electricity—it produces 38 percent of the U.S. power supply. Fracking is swiftly changing this: in 2011, utilities reported plans to shut down 57 of the nation’s 1,287 coal-fired generators the following year. Largely in consequence, U.S. energy-related carbon-dioxide emissions have dropped to figures last seen in 1995. Since 2006, they have fallen more than those from any other nation in the world.

In the sort of development that irresistibly attracts descriptors like ironic, Germany, often touted as an environmental model for its commitment to solar and wind power, has expanded its use of coal, and as a result is steadily increasing its carbon-dioxide output. Unlike Americans, Europeans can’t readily switch to natural gas; Continental nations, which import most of their natural gas, agreed to long-term contracts that tie its price to the price of oil, now quite high.

Several researchers told me that the current towel-snapping between Beijing and Tokyo over islands in the East China Sea is due less to nationalistic posturing than to nearby petroleum deposits.)

What is known, says Timothy Collett, the energy-research director for the USGS program, is that some of the gulf’s more than 3,500 oil and gas wells are in gas-hydrate areas.

In Dutch-disease scenarios, oil weakens all the pillars but one—the petroleum industry, which bloats steroidally.

Because the national petroleum company, with its gush of oil revenues, is the center of national economic power, “the ruler typically puts a loyalist in charge,” says Michael Ross, a UCLA political scientist and the author of The Oil Curse (2012). “The possibilities for corruption are endless.” Governments dip into the oil kitty to reward friends and buy off enemies. Sometimes the money goes to simple bribes; in the early 1990s, hundreds of millions of euros from France’s state oil company, Elf Aquitaine, lined the pockets of businessmen and politicians at home and abroad.

“How will the royal family contain both the mullahs and the unemployed youth without a slush fund?”

It seems fair to say that if autocrats in these places were toppled, most Americans would not mourn. But it seems equally fair to say that they would not necessarily be enthusiastic about their replacements.

The move in Europe to monetary union for weaker countries was a credibility enhancing mechanism that would lower borrowing costs. For countries that had strong creditor positions, the attractions of monetary union lay in the depoliticizing of the adjustment process (James 2012). The Eurozone worked quite well as a disciplining mechanism before it entered into effect, but much less well afterwards.

Banking expanded after the establishment of the euro (Shin 2012). No adequate provision on a European basis existed for banking supervision and regulation, which like fiscal policy, was left to rather diverse national authorities. An explosion of banking activity occurred simultaneously with the transition to monetary union and may well have been stimulated by the new single money.

Opinion poll data shows a major increase in hostility to the EU in peripheral countries, but with no corresponding unpopularity of the common currency.

ransfers from a Luxembourg company to the US would have typically been subject to a withholding tax. Last year, after attracting the attention of Spanish tax authorities, Exxon quietly closed down the operation.

“Normally you would have to pay a 10 per cent withholding tax at source to send profits to the US,

Spain introduced the ETVE in the mid-1990s to encourage foreign investment, and better compete with Luxembourg and Holland for international companies seeking tax-efficient European holding structures. It also allowed for foreign companies to take advantage of Spain’s strong network of bilateral tax treaties with countries in Latin America, such as Argentina, Brazil and Mexico, which can offer more favourable tax rates than other countries. Once the ETVE has been established all overseas dividends that are paid into it are exempt from tax in Spain, and can be easily moved on to a final destination, providing a small number of conditions have been met. Most importantly, corporation tax must have been paid in the country of origin on the dividends being transferred, and companies using ETVEs to house shareholdings in foreign subsidiaries must not be resident in any country identified by Spain as a tax haven.

In fact, Linthal is an ETVE used by Ambev, a subsidiary of Anheuser-Busch InBev, the Belgian-based brewer, to distribute dividends from several Latin American beer brands, such as Argentina’s Quilmes and Cervecería Boliviana Nacional, to its holding company in Brazil.

Between 1991 and 2012 the average annual increase in real wages in Britain was 1.5% and in America 1%, according to the Organisation for Economic Co-operation and Development, a club of mostly rich countries.

Real wage growth in Germany from 1992 to 2012 was just 0.6%; Italy and Japan saw hardly any increase at all.

And the dramatic dip in productivity growth after 2000 seems to have coincided with an apparent acceleration in technological advances as the web and smartphones spread everywhere and machine intelligence and robotics made rapid progress.

A second explanation for the Solow paradox, put forward by Erik Brynjolfsson and Andrew McAfee (as well as plenty of techno-optimists in Silicon Valley), is that technological advances increase productivity only after a long lag.

John Fernald, an economist at the Federal Reserve Bank of San Francisco and perhaps the foremost authority on American productivity figures, earlier this year published a study of productivity growth over the past decade. He found that its slowness had nothing to do with the housing boom and bust, the financial crisis or the recession. Instead, it was concentrated in ICT industries and those that use ICT intensively.

Once an online course has been developed, it can be offered to unlimited numbers of extra students at little extra cost.

For example, new techniques and technologies in medical care appear to be slowing the rise in health-care costs in America. Machine intelligence could aid diagnosis, allowing a given doctor or nurse to diagnose more patients more effectively at lower cost. The use of mobile technology to monitor chronically ill patients at home could also produce huge savings.

Health care and education are expensive, in large part, because expansion involves putting up new buildings and filling them with costly employees. Rising productivity in those sectors would probably cut employment.

The integration of large emerging markets into the global economy added a large pool of relatively low-skilled labour which many workers in rich countries had to compete with. That meant firms were able to keep workers’ pay low.

Productivity growth has always meant cutting down on labour. In 1900 some 40% of Americans worked in agriculture, and just over 40% of the typical household budget was spent on food. Over the next century automation reduced agricultural employment in most rich countries to below 5%,

A new paper by Peter Cappelli, of the University of Pennsylvania, concludes that in recent years over-education has been a consistent problem in most developed economies, which do not produce enough suitable jobs to absorb the growing number of college-educated workers.

When teachers demand rigorous work, students often rise to the occasion, whereas tracking students at different cognitive levels tends to “diminish learning and boost inequality”. Low expectations are often duly rewarded.

America’s classrooms do not fare well in this book. Against these examples of academic achievement, the country’s expensive mistakes look all the more foolish. For example, unlike the schools in Finland, which channel more resources to the neediest kids, America funds its schools through property taxes, ensuring the most disadvantaged students are warehoused together in the worst schools.

Before the protest in London, Uber said on Wednesday that it had opened up its booking platform so that the city’s black taxis, which previously were not included in the start-up’s system, could now take bookings through the smartphone app.

Europe’s taxi operators will demand that local lawmakers clamp down on the California-based Uber, which now operates in 100 cities in 36 countries.

“In Paris, the number of taxis hasn’t changed since the 1950s,” said Pierre-Dimitry Gore-Coty, Uber’s regional general manager for Northern Europe. “The strikes are an attempt to desperately fight against competition in the market.”

France has been one of Uber’s toughest battlegrounds. Faced with protests by the powerful local taxi industry, which has been closed to competition for decades, the government in December sought to curb the rise of Uber and rival upstarts by forcing the car services to wait 15 minutes after receiving a request before picking up a client.

They also say the company’s technology, which allows drivers to ​use a smartphone-like device to ​calculate fares based on time and distance, breaks local laws. The city’s authorities have asked a local court to rule on that issue.

Partly, London taxi drivers resent the idea of G.P.S.-equipped freelancers presuming to practice their time-honored craft.

At the same time, sailing patterns may shift as Asian manufacturing continues to move from China to countries to the south, like Singapore and Vietnam, which are actually closer by sea to East Coast ports through the Suez Canal than to West Coast ports across the Pacific.

For trade with China, Prince Rupert’s appeal is proximity. Prince Rupert is two to three days closer than the western coast of the United States, helping ships cut fuel costs.

While the railways and truck lines in Canada have a history of labor instability, cargo carriers sailing into the country can avoid taxes levied by the United States government.

The methane is like a hangover that you can get over if you stop drinking,” said Raymond T. Pierrehumbert, a climate scientist at the University of Chicago and the author of a textbook on planetary atmospheres. “CO2 is more like lead poisoning — it sticks around, you don’t get rid of it, and it causes irreversible harm.”

Aggressively controlling methane, they say, would help slow the warming sharply over the coming decades.

By contrast, “our success in controlling CO2 emissions is likely to make very little difference on temperature over the next 40 years,” said Drew Shindell, a longtime NASA climate scientist who is leaving for Duke University.

Experts say that, looking at the more distant future, it is hugely important to keep carbon dioxide out of the atmosphere now, even if that requires burning more gas. Dr. Pierrehumbert and Dr. Shindell largely agree on this point, with Dr. Pierrehumbert discounting the gas-is-worse-than-coal argument as “bunkum.”

recent analyses, carried out in conjunction with the establishment of the new BRICS bank, have demonstrated the woeful inadequacy of official assistance and concessional lending for meeting Africa’s infrastructure needs, let alone for achieving the levels of sustained growth needed to reduce poverty significantly.

the conditionality and close monitoring typically associated with the multilateral institutions make them less attractive sources of financing. What politician wouldn’t prefer money that gives him more freedom to do what he likes? It will be years before any problems become manifest – and, then, some future politician will have to resolve them.

So, are shortsighted financial markets, working with shortsighted governments, laying the groundwork for the world’s next debt crisis?

he risks will undoubtedly grow if sub-national authorities and private-sector entities gain similar access to the international capital markets, which could result in excessive borrowing.

Signs of default stress are already showing. In March 2009 – less than two years after the issue – Congolese bonds were trading for 20 cents on the dollar, pushing the yield to a record high. In January 2011, Côte d’Ivoire became the first country to default on its sovereign debt since Jamaica in January 2010.

In June 2012, Gabon delayed the coupon payment on its $1 billion bond, pending the outcome of a legal dispute, and was on the verge of a default. Should oil and copper prices collapse, Angola, Gabon, Congo, and Zambia may encounter difficulties in servicing their sovereign bonds.

They need not only to invest the proceeds in the right type of high-return projects, but also to ensure that they do not have to borrow further to service their debt.

But borrowing money from international financial markets is a strategy with enormous downside risks, and only limited upside potential – except for the banks, which take their fees up front. Sub-Saharan Africa’s economies, one hopes, will not have to repeat the costly lessons that other developing countries have learned over the past three decades.