If all international trade was done through eBay, the world would be 30 per cent richer

Frictionless trade is closer than ever before online, according to a new paper.

If all trade was as frictionless as it is on eBay, the world's real income could be almost 30 per cent higher, according to a new research paper from the European Trade Study Group, in a phenomenon known as the "death of distance".

The study looks at a dataset of cross-border transactions performed over eBay, modified to only include sales from businesses which were concluded with a fixed price; in other words, no auctions, and no customer-to-customer sales. While this removes the majority of transactions from their dataset, the modification is necessary to make eBay sales more accurately represent offline trade.

They find that, unsurprisingly, the effect of distance on trade volume is lessened online. Controlling for standard trade costs "such as the absence of a common language, a common legal system, a border, a colonial history, or a free-trade agreement", the distance effect is 65 per cent smaller online than offline.

That effect may be due to a mixture of three different frictions on trade: shipping costs, information frictions (you can, after all, only export to a country if you know someone there who wants to buy from you), or trust frictions.

Shipping costs appear to have little to do with the death of distance online – partially, it appears, because they have little correlation with distance. For instance, the average shipping cost, as a proportion of the cost of the item, is less from the USA to Iceland than it is for shipping from the USA to Canada or Mexico:

Instead, the real reduction in friction comes from the provision of both trust and information; as a result, "the distance-effect reduction is largest for exporting countries with high levels of corruption and which are relatively unknown to consumers, as measured by Google search results."

Worldwide, the increase in real income achieved by the reductions in distance effects is equal to 29 per cent, but that increase is spread very unevenly. At one end of the extreme, Brazil would see an increase in real income of 80 per cent, if only it could conduct all its trade with the rest of the world as efficiently as it does when that trade is on eBay.

At the other end, Belgium would actually lose out. It currently gains from information frictions, and would lose 0.9 per cent of its real income from trade if those frictions were abolished. It is the only country in the dataset which would lose out in such a way, though, and Britain would be up by over 40 per cent.

Of course, the study doesn't address every aspect of the online world. One of the reasons why eBay is so frictionless is that the company takes a (rather large) cut of the transaction in order to keep that infrastructure maintained. If all the world's trade was carried out on eBay, its annual revenue from international transactions alone would be in the order of $400bn, a significant increase on the $12bn it's earned in the last year. And let's not even talk about the Paypal fees.

Still, the paper strikes a blow in favour of those of us who think there are still significant gains to be made from the online economy.

eBay. Photograph: Getty Images

Alex Hern is a technology reporter for the Guardian. He was formerly staff writer at the New Statesman. You should follow Alex on Twitter.

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Inside Big Ben: why the world’s most famous clock will soon lose its bong

Every now and then, even the most famous of clocks need a bit of care.

London is soon going to lose one of its most familiar sounds when the world-famous Big Ben falls silent for repairs. The “bonging” chimes that have marked the passing of time for Londoners since 1859 will fall silent for months beginning in 2017 as part of a three-year £29m conservation project.

Of course, “Big Ben” is the nickname of the Great Bell and the bell itself is not in bad shape – even though it does have a huge crack in it.

The bell weighs nearly 14 tonnes and it cracked in 1859 when it was first bonged with a hammer that was way too heavy.

The crack was never repaired. Instead the bell was rotated one eighth of a turn and a lighter (200kg) hammer was installed. The cracked bell has a characteristic sound which we have all grown to love.

Big Ben strikes. UK Parliament.

Instead, it is the Elizabeth Tower (1859) and the clock mechanism (1854), designed by Denison and Airy, that need attention.

Any building or machine needs regular maintenance – we paint our doors and windows when they need it and we repair or replace our cars quite routinely. It is convenient to choose a day when we’re out of the house to paint the doors, or when we don’t need the car to repair the brakes. But a clock just doesn’t stop – especially not a clock as iconic as the Great Clock at the Palace of Westminster.

Repairs to the tower are long overdue. There is corrosion damage to the cast iron roof and to the belfry structure which keeps the bells in place. There is water damage to the masonry and condensation problems will be addressed, too. There are plumbing and electrical works to be done for a lift to be installed in one of the ventilation shafts, toilet facilities and the fitting of low-energy lighting.

Marvel of engineering

The clock mechanism itself is remarkable. In its 162-year history it has only had one major breakdown. In 1976 the speed regulator for the chimes broke and the mechanism sped up to destruction. The resulting damage took months to repair.

The weights that drive the clock are, like the bells and hammers, unimaginably huge. The “drive train” that keeps the pendulum swinging and that turns the hands is driven by a weight of about 100kg. Two other weights that ring the bells are each over a tonne. If any of these weights falls out of control (as in the 1976 incident), they could do a lot of damage.

The pendulum suspension spring is especially critical because it holds up the huge pendulum bob which weighs 321kg. The swinging pendulum releases the “escapement” every two seconds which then turns the hands on the clock’s four faces. If you look very closely, you will see that the minute hand doesn’t move smoothly but it sits still most of the time, only moving on each tick by 1.5cm.

The pendulum swings back and forth 21,600 times a day. That’s nearly 8m times a year, bending the pendulum spring. Like any metal, it has the potential to suffer from fatigue. The pendulum needs to be lifted out of the clock so that the spring can be closely inspected.

The clock derives its remarkable accuracy in part from the temperature compensation which is built into the construction of the pendulum. This was yet another of John Harrison’s genius ideas (you probably know him from longitude fame). He came up with the solution of using metals of differing temperature expansion coefficient so that the pendulum doesn’t change in length as the temperature changes with the seasons.

In the Westminster clock, the pendulum shaft is made of concentric tubes of steel and zinc. A similar construction is described for the clock in Trinity College Cambridge and near perfect temperature compensation can be achieved. But zinc is a ductile metal and the tube deforms with time under the heavy load of the 321kg pendulum bob. This “creeping” will cause the temperature compensation to jam up and become less effective.

So stopping the clock will also be a good opportunity to dismantle the pendulum completely and to check that the zinc tube is sliding freely. This in itself is a few days' work.

What makes it tick

But the truly clever bit of this clock is the escapement. All clocks have one - it’s what makes the clock tick, quite literally. Denison developed his new gravity escapement especially for the Westminster clock. It decouples the driving force of the falling weight from the periodic force that maintains the motion of the pendulum. To this day, the best tower clocks in England use the gravity escapement leading to remarkable accuracy – better even than that of your quartz crystal wrist watch.

In Denison’s gravity escapement, the “tick” is the impact of the “legs” of the escapement colliding with hardened steel seats. Each collision causes microscopic damage which, accumulated over millions of collisions per year, causes wear and tear affecting the accuracy of the clock. It is impossible to inspect the escapement without stopping the clock. Part of the maintenance proposed during this stoppage is a thorough overhaul of the escapement and the other workings of the clock.

The Westminster clock is a remarkable icon for London and for England. For more than 150 years it has reminded us of each hour, tirelessly. That’s what I love about clocks – they seem to carry on without a fuss. But every now and then even the most famous of clocks need a bit of care. After this period of pampering, “Big Ben” ought to be set for another 100 or so years of trouble-free running.

The Conversation

Hugh Hunt is a Reader in Engineering Dynamics and Vibration at the University of Cambridge.

This article was originally published on The Conversation. Read the original article.