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Hopefully the following ten observations are less controversial in 2013 than in previous years.

As long known by elementary textbook readers, austerity policies have contractionary effects.

Debt reduction is a very long process; we're talking about decades,

No, the real story behind the euromess lies not in the profligacy of politicians but in the arrogance of elites — specifically, the policy elites who pushed Europe into adopting a single currency well before the continent was ready for such an experiment.

Consider the case of Spain, which on the eve of the crisis appeared to be a model fiscal citizen.

But with its warm weather and beaches, Spain was also the Florida of Europe — and like Florida, it experienced a huge housing boom. The financing for this boom came largely from outside the country: there were giant inflows of capital from the rest of Europe, Germany in particular.

The fact is that three years ago none of the countries now in or near crisis seemed to be in deep fiscal trouble.

Then came the global financial crisis. Those inflows of capital dried up; revenues plunged and deficits soared; and membership in the euro, which had encouraged markets to love the crisis countries not wisely but too well, turned into a trap.

THE European Monetary Union, the basis of the euro, began with a grand illusion. On one side were countries — Austria, Finland, Germany and the Netherlands — whose currencies had persistently appreciated, both within Europe and worldwide; the countries on the other side — Belgium, France, Greece, Italy, Portugal and Spain — had persistently depreciating currencies.

Rather than pulling the lagging countries forward, the low interest rates of the European Central Bank have lured governments and households, especially in the southern part of the euro zone, into frivolous budgetary policies and excessive consumption.

the solution is clear: the only way to avoid further harm to the global economy is for Germany to lead its fellow stable states out of the euro and into a new and stronger currency bloc.

Besides, he added, costs and fees can shift; Panama can be expected to raise rates for canal passage, and “the railroads are not going to sit idly by” and let the water route undercut their business.

After Hurricane Katrina, Gov. Haley Barbour of Mississippi trumpeted plans for a “port of the future” at Gulfport with a 50-foot-deep channel, redirecting some $600 million in federal housing disaster funds on a project he pledged would spur the economy and create bountiful jobs.

Richard Koo (2003) coined the term “balance sheet recession” to characterise the endless travail of Japan following the collapse of its real estate and stock market bubbles in 1990. The Japanese government did not act to repair the balance sheets of the private sector following the crash. Instead, it chose a policy of keeping bank rate near zero so as to reduce deposit rates and let the banks earn their way back into solvency. At the same time it supported the real sector by repeated large doses of Keynesian deficit spending. It took a decade and a half for these policies to bring the Japanese economy back to reasonable health.

At the time, a majority of forecasts predicted that the economy would slip back into depression once defence expenditures were terminated and the armed forces demobilised. The forecasts were wrong. This famous postwar “forecasting debacle” demonstrated how simple income-expenditure reasoning, ignoring the state of balance sheets, can lead one completely astray.

he world is now using a record amount of oil even though Europe and the United States are paring back.

In most cases, mining tar sands involves drilling two horizontal wells, one above the other, into the bitumen layer; injecting massive gouts of high-pressure steam and solvents into the top well, liquefying the bitumen; sucking up the melted bitumen as it drips into the sand around the lower well; and then refining the bitumen into “synthetic crude oil.”

Economists sometimes describe a fuel in terms of its energy return on energy invested (EROEI), a measure of how much energy must be used up to acquire, process, and deliver the fuel in a useful form. OPEC oil, for example, is typically estimated to have an EROEI of 12 to 18, which means that 12 to 18 barrels of oil are produced at the wellhead for every barrel of oil consumed during their production. In this calculation, tar sands look awful: they have an EROEI of 4 to 7. (Steaming out the bitumen also requires a lot of water. Environmentalists ask, with some justification, where it all is going to come from.)

To obtain shale gas, companies first dig wells that reach down thousands of feet. Then, with the absurd agility of anime characters, the drills wriggle sideways to bore thousands of feet more through methane-bearing shale. Once in place, the well injects high-pressure water into the stone, creating hairline cracks. The water is mixed with chemicals and “proppant,” particles of sand or ceramic that help keep the cracks open once they have formed. Gas trapped between layers of shale seeps past the proppant and rises through the well to be collected.

The tragedy of Argentina A century of decline

In the 43 years leading up to 1914, GDP had grown at an annual rate of 6%, the fastest recorded in the world.

The country ranked among the ten richest in the world, after the likes of Australia, Britain and the United States, but ahead of France, Germany and Italy.

This coincided with the bubble years in peripheral Eurozone countries (2003-07). The effect of this is that Germany accumulated large net claims on Eurozone countries, which at the end of 2011 amounted to €634 billion.

These current account surpluses did not lead to TARGET2 claims during the bubble years because the counterpart of these surpluses were increasing claims held by (mainly) German banks against the other Eurozone countries.

the German banking system was lending the money to other Eurozone countries to allow them to buy surplus German products – a highly risky affair.

But more important is the manner in which a damning verdict from the voters would make governments more cautious about eurozone integration, limiting the extent to which the strong support the weak and all feel they are in the same boat.

These four steps are: to set up a comprehensive banking union; to ensure hard-pressed companies in recession-hit southern Europe receive credit at interest rates comparable to those enjoyed by their competitors in the north; to reduce mass unemployment, especially among youth; and to make sustainable the public debts of Greece and other states deep in hock.

The problem with TTIP

The TPP is a deep international integration arrangement between the US and 11 other Pacific states, which would cover 40% of world GDP and over 30% of world trade. It seeks to address as series of issues that 21st century commerce, but arguably its most obvious feature is that it excludes China – the world’s largest international trader and before long the world’s largest economy. There are, of course, the ritual genuflections towards ‘open regionalism’ – China can join if only it will agree to the necessary policy requirements – but this is about as much use as saying the Chief Rabbi can dine with you while insisting that the menu contains pork.

By signing TTIP Europe would be tying itself to a static rather than a dynamic part of the world economy and substantially reinforcing the US’s exclusionary policies.

“Mexicans discovered vulcanization 3,500 years before Goodyear,” said Dorothy Hosler, an M.I.T. professor of archaeology and ancient technology. “The Spanish had never seen anything that bounced like the rubber balls of Mexico.”

Dr. Ochsendorf, a specialist in early architecture and engineering, said the colonial government tried many times to erect European arch bridges across the canyons, and each attempt ended in fiasco until iron and steel were applied to bridge building.

The Inca suspension bridges achieved clear spans of at least 150 feet, probably much greater. This was a longer span than any European masonry bridges at the time. The longest Roman bridge in Spain had a maximum span between supports of 95 feet. And none of these European bridges had to stretch across deep canyons.

There are successful plants harvesting heat from deep hot rock in Australia, Europe and Japan,

The generating capacity by 2050 could be 100 billion watts, about 10 percent of the country’s current generating capacity