50 Things That Made the Modern Economy

How much might global economic output rise if anyone could work anywhere? Some economists have calculated it would double. By the turn of the 20th century only a handful of countries were still insisting on passports to enter or leave. Today, migrant controls are back in fashion. It can seem like a natural fact of life that the name of the country on our passport determines where you can travel and work – legally, at least. But it’s a relatively recent historical development – and, from a certain angle, an odd one. Many countries take pride in banning employers from discriminating against characteristics we can’t change: whether we’re male or female, young or old, gay or straight, black or white. It’s not entirely true that we can’t change our passport: if you’ve got $250,000, for example, you can buy one from St Kitts and Nevis. But mostly our passport depends on the identity of our parents and location of our birth. And nobody chooses those. (Photo: Irish and UK passports are on display. Credit: Getty Images)

When the great novelist Charles Dickens arrived in America in 1842, he was hoping to put an end to pirated copies of his work in the US. They circulated there with impunity because the United States granted no copyright protection to non-citizens. Patents and copyright grant a monopoly, and monopolies are bad news. Dickens’s British publishers will have charged as much as they could get away with for copies of Bleak House; cash-strapped literature lovers simply had to go without. But these potential fat profits encourage new ideas. It took Dickens a long time to write Bleak House. If other British publishers could have ripped it off like the Americans, perhaps he wouldn’t have bothered. As Tim Harford explains, intellectual property reflects an economic trade-off – a balancing act. If it’s too generous to the creators then good ideas will take too long to copy, adapt and spread. But if it’s too stingy then maybe we won’t see the good ideas at all. Producer: Ben Crighton Editors: Richard Knight and Richard Vadon (Image: Copyright stamp, Credit: Arcady/Shutterstock)

From Spacewar to Pokemon Go, video games – aside from becoming a large industry in their own right – have influenced the modern economy in some surprising ways. Here’s one. In 2016, four economists presented research into a puzzling fact about the US labour market. The economy was growing, unemployment rates were low, and yet a surprisingly large number of able-bodied young men were either working part-time or not working at all. More puzzling still, while most studies of unemployment find that it makes people thoroughly miserable, the happiness of these young men was rising. The researchers concluded that the explanation was simply that this cohort of young men were living at home, sponging off their parents and playing videogames. They were deciding, in the other words, not to join the modern economy in some low-paid job, because being a starship captain at home is far more appealing. Producer: Ben Crighton Editors: Richard Knight and Richard Vadon (Photo: Hands holding game pad and playing shooter game on TV screen. Credit: Getty Images)

The Egyptians thought literacy was divine; a benefaction which came from the baboon-faced god Thoth. In fact the earliest known script – “cuneiform” – came from Uruk, a Mesopotamian settlement on the banks of the Euphrates in what is now Iraq. What did it say? As Tim Harford describes, cuneiform wasn’t being used for poetry, or to send messages to far-off lands. It was used to create the world’s first accounts. And the world’s first written contracts, too. Producer: Ben Crighton Editors: Richard Knight and Richard Vadon (Image: Close-up of clay tablet, Credit: Kotomiti Okuma/Shutterstock)

Tim Harford tells the surprising story of air conditioning which was invented in 1902 to counter the effects of humidity on the printing process. Over the following decades “aircon” found its way into our homes, cars and offices. But air conditioning is much more than a mere convenience. It is a transformative technology; one that has had a profound influence on where and how we live. Producer: Ben Crighton Editors: Richard Knight and Richard Vadon (Image: Air conditioning vent, Credit: Dorason/Shutterstock)

In 1853 Elisha Otis climbed onto a platform which was then hoisted high above a large crowd of onlookers, nervy with anticipation. A man with an axe cut the cable, the crowd gasped, and Otis’s platform shuddered – but it did not plunge. “All safe, gentlemen, all safe!” he boomed. The city landscape was about to be turned on its head by the man who had invented not the elevator, but the elevator brake. As Tim Harford explains, the safety elevator is an astonishingly successful mass transit system which has changed the very shape of our cities. Producer: Ben Crighton Editors: Richard Knight and Richard Vadon (Image: Modern Elevator, Credit: iurii/Shutterstock)

The contraceptive pill had profound social consequences. Everyone agrees with that. But – as Tim Harford explains – the pill wasn’t just socially revolutionary. It also sparked an economic revolution, perhaps the most significant of the late twentieth century. A careful statistical study by the Harvard economists Claudia Goldin and Lawrence Katz strongly suggests that the pill played a major role in allowing women to delay marriage, delay motherhood and invest in their own careers. The consequences of that are profound. Producer: Ben Crighton Editors: Richard Knight and Richard Vadon (Image: Oral contraceptive pill, Credit: Areeya_ann/Shutterstock)

The way educated women spend their time in the United States and other rich countries has changed radically over the past half a century. Women in the US now spend around 45 minutes per day in total on cooking and cleaning up; that is still much more than men, who spend just 15 minutes a day. But it is a vast shift from the four hours a day which was common in the 1960s. We know all this from time-use surveys conducted around the world. And we know the reasons for the shift. One of the most important of those is a radical change in the way food is prepared. As Tim Harford explains, the TV dinner – and other convenient innovations which emerged over the same period – have made a lasting economic impression. Producer: Ben Crighton Editors: Richard Knight and Richard Vadon (Image: TV Dinner, Credit: Shutterstock)

“Superstar” economics – how the gramophone led to a winner-take-all dynamic in the performing industry. Elizabeth Billington was a British soprano in the 18th century. She was so famous, London’s two leading opera houses scrambled desperately to secure her performances. In 1801 she ended up singing at both venues, alternating between the two, and pulling in at least £10,000. A remarkable sum, much noted at the time. But in today’s terms, it’s a mere £687,000, or about a million dollars; one per cent of a similarly famous solo artist’s annual earnings today. What explains the difference? The gramophone. And, as Tim Harford explains, technological innovations have created “superstar” economics in other sectors too. Producer: Ben Crighton Editors: Richard Knight and Richard Vadon (Image: Thomas Edison Phonograph, Credit: James Steidl/Shutterstock)

Murderers in early 19th century London feared surviving their executions. That’s because their bodies were often handed to scientists for strange anatomical experiments. If George Foster, executed in 1803, had woken up on the lab table, it would have been in particularly undignified circumstances. In front of a large London crowd, an Italian scientist with a flair for showmanship was sticking an electrode up Foster’s rectum. This is how the story of the battery begins – a technology which has been truly revolutionary. As Tim Harford explains, it’s a story which is far from over. Producer: Ben Crighton Editors: Richard Knight and Richard Vadon (Image: Used Batteries, Credit: Gerard Julien/Getty Images)

Take a very large prime number – one that is not divisible by anything other than itself. Then take another. Multiply them together. That is simple enough, and it gives you a very, very large “semi-prime” number. That is a number that is divisible only by two prime numbers. Now challenge someone else to take that semi-prime number, and figure out which two prime numbers were multiplied together to produce it. That, it turns out, is exceptionally hard. Some mathematics are a lot easier to perform in one direction than another. Public key cryptography works by exploiting this difference. And without it we would not have the internet as we know it. Tim Harford tells the story of public key cryptography – and the battle between the geeks who developed it, and the government which tried to control it. (Photo: Encryption algorithms. Credit: Shutterstock)

Robots threaten the human workforce, but their ubiquity and growing competence make them crucial to the modern economy. In 1961 General Motors installed the first Unimate at one of its plants. It was a one-armed robot resembling a small tank that was used for tasks like welding. Now, as Tim Harford explains, the world’s robot population is expanding rapidly (the robot “birth rate” is almost doubling every five years) and, coupled with rapid advances in artificial intelligence, robots are changing the world of work in unexpected ways. (Photo: Robot, Credit: Toru Yamanaka/Getty Images)

King Camp Gillette came up with an idea which has helped shape the modern economy. He invented the disposable razor blade. But, perhaps more significantly, he invented the two-part pricing model which works by imposing what economists call “switching costs”. If you’ve ever bought replacement cartridges for an inkjet printer you experienced both when you discovered that they cost almost as much as the printer itself. It’s also known as the “razor and blades” model because that’s where it first drew attention, thanks to King Camp Gillette. Attract people with a cheap razor, then repeatedly charge them for expensive replacement blades. As Tim Harford explains, it’s an idea which has been remarkably influential. Producer: Ben Crighton Editors: Richard Knight and Richard Vadon (Image: Razor, Credit: Shutterstock)

There’s no such thing as “the correct time”. Like the value of money, it’s a convention that derives its usefulness from the widespread acceptance of others. But there is such a thing as accurate timekeeping. That dates from 1656, and a Dutchman named Christiaan Huygens. In the centuries since, as Tim Harford explains, the clock has become utterly essential to almost every area of the modern economy. Producer: Ben Crighton Editors: Richard Knight and Richard Vadon (Image: A wall clock. Credit: Shutterstock)

The words 'clever' and 'death' crop up less often than 'Google' in conversation. That’s according to researchers at the University of Lancaster in the UK. It took just two decades for Google to reach this cultural ubiquity. Larry Page and Sergey Brin – Google’s founders – were not, initially, interested in designing a better way to search. Their Stanford University project had a more academic motivation. Tim Harford tells the extraordinary story of a technology which might shape our access to knowledge for generations to come. Producer: Ben Crighton Editors: Richard Knight and Richard Vadon (Image: Google logo and search box on a screen. Credit: Yui Mok/PA Wire)