Johan Fourie's blog

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Archive for the ‘Economic history’ Category

Join me in New York and Boston!

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On 26 July, the Economics department and LEAP will host a Stellenbosch alumni event in New York. I’ll give a short talk on ‘The Data Revolution in African Economic History’. Four days later, on Monday, 30 July, we’ll host another event in Boston. If you are in the neighbourhood and want to drop in to hear what we’re doing at LEAP, in the department and at Stellenbosch University, please send me a mail. In New York, we’ll meet at the ING offices and in Boston, we’ll be at the Residence Inn hotel in Cambridge.

The reason I’ll be in the US is to participate in the World Economic History Congress, which is hosted by MIT this year. I’m responsible for five papers (yes, I know, this is bad planning), so it will be a busy conference. The programme can be downloaded here. I hope to share some of the results of this research on this blog over the coming three months. (Also, I’m excited about plans for a new look blog. More about that later.)

After the WEHC2018, I’ll take a two-week break before going on a seminar tour in Gauteng, delivering papers at the universities of Pretoria (27 August), Wits (29 August), Johannesburg (30 August) and North-West, Potchefstroom (31 August). I’ll post more detail about those talks closer to the time.

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The Autshumao and Krotoa International Airport of Cape Town: My letter to ACSA

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Renaming of Cape Town International Airport: A proposal

I would hereby like to submit a nomination for Cape Town International Airport’s new name.

Cape Town is an international, cosmopolitan city, a ‘melting pot of cultures’. Many individuals from Cape Town’s rich history deserve to be celebrated in the renaming of Cape Town International Airport. Yet I often find that little attention is given, in place names, traditions, and heritage symbols, to the indigenous inhabitants of the region before the arrival of European settlers in the mid-seventeenth century.

I therefore feel it is appropriate that Cape Town’s international airport should celebrate the people who had lived in the region for several centuries before European arrival, who had contributed to the economic and social development of the Cape, often in subordinate positions of indentured labour, and whose descendants still reside here, now mixed with more recent immigrants from Europe, Asia and Africa, a city that is, indeed, a ‘melting pot of cultures’.

My proposal is therefore to rename Cape Town International Airport to the Autshumao and Krotoa International Airport of Cape Town.

Autshumao was the first inhabitant of South Africa to travel abroad. In 1630, Autshumao was picked up by a British ship – called ‘King Harry’ on board – and travelled to the East. There he learned Dutch and English, and when he returned to the Cape, he would become postmaster on Robben Island. He would also act as the first translator and trader when the Dutch East India Company settlers established a refreshment station in 1652. Autshumao later fell into disfavour as trading partner, and was banned to Robben Island. Nelson Mandela would later call him the ‘first freedom fighter’.

His niece, Krotoa, was a translator in the household of Jan van Riebeeck, the first VOC commander of the Cape. She would marry a Danish surgeon and her progeny would include several South Africans of note, including Paul Kruger, Jan Smuts and FW de Klerk.

Naming Cape Town International Airport the Autshumao and Krotoa International Airport of Cape Town would signal recognition of the first inhabitants of Cape Town, and the ‘melting pot of cultures’ that Cape Town has become.

Kind regards,

Johan Fourie

Land expropriation: learning from the Chinese

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The complexity of the debate about land expropriation without compensation can ultimately be summarized into two questions: Should land be expropriated without compensation? And, if so, who should own the expropriated land? While much media attention has focused on the first, with the focus often on how such a policy will scare off foreign investment, it is the answer to the second, ultimately, that will determine the success of any attempt at redress and wealth creation.

The two proponents of a policy of land expropriation without compensation in South Africa – the ANC and the EFF – stand on very different sides with regards to answering the second question: the ANC has made it clear that ownership should be in private hands, while the EFF has forcefully and repeatedly made the case that the state should be the custodian of all land. Their policy would see the state expropriate all private farm land and lease the land ‘equally’ to the people of South Africa. Dali Mpofu, National Chairperson of the EFF and a respected advocate, has defended this stance by referring to China in a 2017 tweet: ‘Chinese land is owned … by the state and it has registered the highest consistent economic growth in the world!’

Mpofu’s example is an interesting one, and worth exploring. Indeed, Chinese economic growth over the last four decades has been a historically unprecedented 8% per year. But Mpofu would do well to note that this growth was not a consequence of agriculture. Between 1990 and 2016, the share of agriculture in GDP has fallen dramatically from 26.5% to 8.5%. This was associated with massive urbanization; in 2016, 57.4% of the total population lived in urban areas, a dramatic increase from 26% in 1990. Far fewer people now live off the land, and those that have moved to the (often new) cities, are remarkably better off.

This is because land is not the valuable commodity it once was in the nineteenth and twentieth centuries. As a way to empower people, land is probably the least useful asset nowadays, because it requires significant investment in physical and human capital to make it productive. Even then, the most valuable assets today are intangible – skills, intellectual property rights, data. In the twentieth century, agriculture could only thrive with significant state intervention in the form of marketing councils, favourable tariffs and other measures, measures that came at the cost of the South African consumer. In the 21st century economy, living off the land – without significant capital investment – will limit the ability of those that most need access to good education and health services and opportunities for social mobility that are found in cities.

This is even more true if the expropriated land is owned by the state. Let us return to Mpofu’s country of choice: China. Between 1955 and 1957, 96% of China’s 550 million peasants were dispossessed of their private property rights. This was the largest movement from private to communal property rights in history. As Shuo Chen and Xiaohuan Lan show in a 2017 paper published in the American Economic Journal: Applied Economics, the results of this process of land dispossession was devastating for the peasants, and the Chinese economy. The authors use data of 1600 counties that launched the movement in different years, and find that in the year of the dispossession, the number of cattle declined by 12 to 15%. In total, this was a loss of almost 10 million head of cattle. Why? Because people started killing their own animals to keep the meat and hides as soon as they released that they will lose the property rights to the use of those animals, and they did not trust the state to be able to safeguard what used to be theirs. This loss also affected grain output, which fell by 7%. We now know that Mao was not discouraged by this initial production shock. No, he doubled down. This initial process of land dispossession set the stage for the Great Leap Forward movement of 1958, which led to the worst famine in human history that killed an estimated 30 million people.

China’s process of collectivization should be the example that Mpofu and the EFF leadership study. If they want more evidence of how collectivization collapses an economy, they need look no further than Tanzania’s Ujamaa and Operation Vijiji, a much understudied but enlightening experience. Or ask our Zimbabwean neighbours about their land reform programme. As Tawanda Chingozha, a PhD student in the Department of Economics at Stellenbosch University, shows using sophisticated satellite imaging technology, Zimbabwe’s land reform programme caused a significant reduction in both the quantity and quality of crops harvested, and not only on formerly white commercial farms. The empirical evidence against state-owned land ownership is unequivocal.

Land is an emotive issue because the memories of dispossession, forced removals, and apartheid segregation remain vivid for many. Others are simply unhappy with the slow process of economic progress in the last decade, and see in land a source of safety and security.

But if land is expropriated and private property removed, the hope of economic progress will be nothing more than a mirage. We have smart people in South Africa. Surely we can find a way of redress that actually empowers people – and won’t replicate our disastrous past policies that subjugated the poorest to a life of poverty on the periphery of progress?

*An edited version of this article originally appeared in the 26 April edition of finweek.

The stories we do not tell

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One of my favourite scenes in Love, Actually is right at the beginning of the movie. The setting is an airport arrivals terminal. As travelers arrive through the gates, they are welcomed by family and friends, smiling, laughing, hugging and kissing. Whenever I have to pick someone up at the international terminal, I do my best to arrive early, and to witness the joy of family and friend reunions.

I would contest that there is another setting where you’re guaranteed to be uplifted. Graduation ceremonies. I was fortunate to attend one of these at the end of March where hundreds of students received their degrees, with thousands of friends and family watching on. Each applause and ululation tells a story, stories often coupled with hardship, sacrifice and perseverance but also with hope, faith and, ultimately, success. There are few things better to see than a father or mother, proud and captivated as their son or daughter walks across the stage, holding back the tears.

Several of my own Economics students graduated too, each with their own stories. Thokozire Gausi graduated with an Honours degree. She is from Malawi and part of a network of students that self-finance their studies in South Africa, often with very little institutional support. Masters-degree graduate Omphile Ramela, who grew up in Soweto, wrote his dissertation while playing professional cricket for the Cape Cobras and, now, the Highveld Lions, and while balancing the demands of a young family. Abel Gwaindepi received his PhD in Economics. He grew up in Zimbabwe, where his father worked in the sugarcane plantations of Anglo-American. Abel has 16 siblings, many of whom he had to support with his meagre scholarships through an undergrad at Fort Hare, a postgraduate at Rhodes and, ultimately, a PhD at Stellenbosch. It is difficult to imagine what that moment of graduation must have felt like for Abel and the Gwaindepi family.

At the same ceremony, both Patrice Motsepe and Jannie Mouton received honorary doctorates, and had the chance to say a few short words. Motsepe noted South Africa’s amazing people, and our duty to ensure that each has the opportunity to live a life of dignity and prosperity. We underestimate our own abilities, Motsepe said, to make a success of South Africa. Mouton highlighted the wealth of opportunities in the country. Focus, he said, on the opportunities instead of being an expert on the problems. ‘Build a business, employ people, pay taxes – contribute.’

Negativity pervades our society, and can be incredibly debilitating. A few minutes on Twitter and you’re bound to find discussions that turn into slurs and slanders which will only end in ignorance and intolerance. But – and this I repeat to myself and my students frequently – Twitter is not the real world. Despite all the negativity that surrounds us, there is one undeniable truth: there has never been a better time to be human than in 2018.

The story we do not tell often enough – and one that still surprises each new cohort of students I teach – is that life is getting better. Yes, we have tremendous challenges in South Africa, in Africa and globally, but we are making good progress to tackling these head-on. Six of the ten fastest growing economies in 2018 will be in Africa. But it is not only incomes that are improving. Steven Pinker, in the first few chapters of his new book, Enlightenment Now, provides a wonderful summary of the trends in health, happiness, and living standards, as well as inequality, the environment, safety and democracy. In each case, the evidence suggests that we live in a much better world than our parents and grandparents.

This good story did not just happen for no reason. It is humankind’s ability to use the resources of nature and transform them into food, clothing and shelter, through ever-increasing understanding of science, our complex technologies and sophisticated institutions, that have allowed us to build a more prosperous world. I really like the way Pinker explains this:

Poverty needs no explanation. In a world governed by entropy and evolution, it is the default state of humankind. Matter does not arrange itself into shelter or clothing, and living things do everything they can to avoid becoming our food. As Adam Smith pointed out, what needs to be explained is wealth. Yet even today, when few people believe that accidents or diseases have perpetrators, discussions of poverty consist mostly of arguments about whom to blame for it.

That our world is getting better should not mean that we can get complacent. As we’ve seen in several countries around the world, places like Syria, Venezuela and Zimbabwe, when things fall apart, living standards quickly revert back to poverty and chaos. As long as we understand that investment in better knowledge about how the world works lies at the heart of our story – in other words, investing in innovation, science and technology – such an outcome is unlikely for South Africa. The worrying thing about our recent budget is that the allocation towards this category will grow at less than the inflation rate. Our politicians seem to not understand that our wealth is dependent not on connections, mineral resources or land. Instead, it is the result of innovation-led improvements in productivity that explains the huge progress of the last two centuries.

Motsepe and Mouton are both correct: we have amazing people and amazing opportunities. But we will only be able to tell a good story if we invest in those amazing people – like Thoko, Omphile and Abel – to use their knowledge and skills to take advantage of those opportunities.

*An edited version of this article originally appeared in the 12 April edition of finweek.

A moment to remake South Africa

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At the dawn of independence, it fell on the first generation of African leaders to choose a new economic paradigm to deliver economic freedom to their people. In the Cold War between capitalism and communism, these African leaders almost unilaterally preferred a third option – ‘African socialism’ – a potpourri of policies built on the ethic of egalitarianism grounded in African history and culture.

At the second annual LEAP Lecture at Stellenbosch University in October 2017, Emmanuel Akyeampong, professor of African history at Harvard University, returned to the topic of ‘African socialism’ following independence, and its consequences for the continent. In countries as diverse as Ghana, Tanzania, Senegal and Guinea, he notes, the new policies were, ultimately, attempts to industrialise, to break away from the agriculture-based systems of the colonial economies.

In Kwame Nkrumah’s Ghana, for example, plans were drawn up for massive infrastructure investments. Sadly, many of these projects never got off the ground, or were only finished much later. In one project, for example, Nkrumah convinced the Russians to build a railway from Kumasi to Ouagadougou, the capital of Burkino Faso, but the railway was never completed.

The most extreme version of ‘African socialism’ was Julius Nyerere’s umajaa (villagization) campaign in Tanzania in 1967. This essentially meant the collectivization of all forms of productive capacity, notably in agriculture; Tanzanians, Nyerere believed, must learn to free themselves from dependence on European powers by becoming self-reliant.

Nyerere’s bold vision, and those of his contemporaries, failed miserably. Says Akyeampong: “The 1980s put paid to the concept and the vision, as steep economic decline resulted in what has been called Africa’s ‘lost decade’; the most notable architect of African socialism, Nyerere, conceded that his attempt at ujamaa had failed and stepped down from power in 1985; and the collapse of the Soviet Union in 1989 marked the triumph and ascendancy of capitalism.”

But Akyeampong is less interested in the reasons for their failures than in the boldness of their visions.  “It is the vision of bold and broad transformative change that I find admirable and worthy of emulation, and the desire to lift entire populations out of poverty and give them a decent life.” This optimism and boldness was not limited to the African leaders themselves; even the World Bank, soon after independence, remarked: ‘For most of Africa, the economic future before the end of the century can be bright’.

As I listened to Cyril Ramaphosa deliver his first State of the Nation address, I was reminded of that special moment in time when monumental change seemed possible. The general mood seems to have lifted after Jacob Zuma’s departure. Is this another moment when the trajectory of history seems to shift gear?

We should, of course, learn from history. Utopian visions of the future can easily become a justification for social engineering. While a powerful state can quickly transform society, it can do so at the cost of freedom. This is not the route I have in mind. Instead, this opportune moment can be used to redefine the social contract, to implement a nuanced set of social democratic policies with two explicit aims: economic security and economic freedom. In short, we want to live in a just and prosperous society.

How do we achieve that? Security requires that people have a basic standard of living. One policy proposal that has attracted a lot of interest is the basic income grant, a small monthly grant (of say R752, the lower-bound poverty line) to every South Africa, regardless of income. This would replace the child support grant. Every person with an ID document will be required to open a bank account (perhaps with a new state deposit bank), which will be linked to their SARS account. To partially fund this, VAT will increase. A tax on consumption means we incentivise savings and investment, the heart of creating economic prosperity.

There are many such policy options. State ownership of some assets, like aeroplanes and television stations, make little sense. These can be sold to pay off national debt and lower personal income taxes. Government can also save by reducing the number and size of departments and keeping the increases in the public wage bill to less than inflation.

As South African cities have some of the longest transit times in the world, infrastructure investment in urban areas – notably in public transport and housing – needs urgent attention. Water and electricity can benefit from innovations like desalination and solar panels. Broadband access can be expanded through incentive programmes.

A prosperous society requires an educated populace and work for them. Investing in early childhood development is key to eradicate large discrepancies that already exist when kids arrive at school. Incorporating the private sector in secondary and tertiary education, perhaps through a voucher system, is one way to not only improve the quantity of seats in class, but also provide opportunities for entrepreneurs at the local level. We should also welcome immigrants with skills with open arms; they not only bring much-needed expertise, but they often build new businesses that create jobs and improve living standards.

Cyril Ramaphosa has a window of opportunity in the first few months of his tenure. He can dare to be bold, and should do so. Says Akyeampong: “We need the bold and transformative vision of the likes of Nyerere and Nkrumah to ensure that come 2050 we do not find ourselves in the same predicament as on the eve of independence, when our new leaders, coming out of decades of repressive colonial economic policies, were faced with what appeared to be insurmountable challenges.” What will economic historians, fifty years from now, say about Ramaphosa’s moment to remake South Africa?

*An edited version of this article originally first appeared in the 15 March edition of finweek

Patience is not only a virtue

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Cologne Cathedral. Painting by Josef Langl

Patience is not only a virtue. It might also be the root of economic prosperity.

On 15 August 1248, the Archbishop of Cologne laid the foundation stone of a cathedral that would take 632 years to complete. One of the remarkable things about the cathedral, apart from the mesmerizing Gothic architecture of its twin spires that stand 157m tall, is that it was largely funded by civil society. How is it possible, one wonders, that a community can fund the construction of a building that they, nor their children, nor even their children’s children, would never see completed?

Patience is a virtue, says a fifth-century poem, but economists are increasingly confident that is a key building block of economic prosperity too. Two concepts are of relevance. The first is to what degree do you consider the future in your decision-making – your time preference. The second concept is the period of time that is relevant for you current decision-making – your time horizon. Patient people tend to have a high time preference and a long time horizon. And as more and more experimental evidence now show, so do successful people.

The study of patience was made famous by the Stanford marshmallow experiment. In the late 1960s, Walter Mischel offered children, in a controlled experimental environment, a choice between a small reward like a marshmallow immediately or a larger award (two marshmallows) if they waited 15 minutes. Some children immediately grabbed the marshmallow and swallowed it down. Others waited a while, and then had a bite. But several waited diligently until the fifteen minutes had passed for their second marshmallow. To their surprise, the researchers found in follow-up studies that children who were able to wait for the higher pay-off were also more likely to have better school outcomes, BMI and other life measures.

The question, of course, is whether patience is the result of genetic inheritance or environmental influence. In a 2007 Journal of Public Economics paper, Eric Bettinger and Robert Slonim found that parent’s patience are uncorrelated with their children’s patience, questioning the belief that it’s only nature at work. They also found, however, that mathematics scores and whether a child has attended a private school was also uncorrelated, suggesting that nurture’s influence is also limited.

The one result that most studies find is that girls tend to be more patient than boys. This has important implications for motiving children. Girls are more likely, for example, to respond to student performance incentives. A study that paid Israeli students conditional on their performance on university exams had a greater effect on girls. Knowing what determines patience can go a long way in helping kids perform better at school, and achieve better life outcomes.

While most research focus on individual-level outcomes, the question is whether patience also matters at the societal level? Global surveys now ask questions that allow us to deduce some measure of time preference or time horizon. The results suggest that while these generally correlate positively with GDP per capita, it is not always the case. Citizens of Botswana and Kenya, for example, are more patient, on average, than those of Japan and France. (South Africa, by the way, is very close to the world average.)

Patience does not only vary across space, but also across time. At a conference at Stellenbosch University during November last year, Jan Luiten van Zanden and Gerarda Westerhuis of Utrecht University presented a paper on how time preference has changed across the last few centuries. They argue that, during the Middle Ages in Europe, the ‘future’ became more important, in other words, people’s time preference increased. The consequence was that saving and investment increase, and that people started to accumulate capital with long time horizons. The construction of the Cologne Cathedral is one example of this. Why that is remains somewhat of a mystery, but there are clues in the changing (religious) beliefs and institutions of the time. Consider, for example, the emergence of corporations, initially religious institutions and guilds but later companies, notably the limited liability company, which would transcend the life of shareholders. The rise of big business would follow in the late nineteenth and early twentieth century, where salaried managers now focused on long-term value creation.

Van Zanden and Westerhuis argue, however, that this trend has reversed in the last few decades. Since the 1970s, ‘short-terminism’ is on the increase, reflected in the focus of short-term value for shareholders (and performance-related pay for managers). One of the factors that might explain this is the shift from modernism to post-modernism. Modernists believed that the future could be changed, for example, through strategic planning in a business environment or (in the case of the Soviet Union) even an economy. The rise of post-modernist beliefs – the belief that reality cannot be known and the future cannot be predicted or changed – has shifted our long-term gaze to the present. Instant gratification, exacerbated by social media, is now the order of the day.

There are valid reasons to question these preliminary findings. Companies like Alphabet (Google’s parent company), Apple and Facebook seem to be able to invest in new technologies where the pay-offs are only likely to be in the medium- to long-run. But it is difficult to imagine that we invest in something that we won’t see the end of: perhaps that is why tackling climate change is so difficult!

Time preference and time horizon remains vastly understudied topics. We know that time preference (roughly proxied for by people’s patience) matters at the individual level; more patient people are more ‘successful’ later in life. What we don’t know is why they are patient, and how to improve our impatient natures.

Similarly, we know that some societies, at certain times in history, had a longer time horizon. Those societies were then able to invest and accumulate, improving the prosperity of the generations to follow.

Consider this: children born in 2018 are likely to live to the year 2100. Are our political and business leaders factoring the year 2100 into their long-term strategies? Unlikely. Perhaps we need a bit more of the long-term horizon the inhabitants of Cologne had when they decided to build a cathedral 632 years before it was completed.

>>> An edited version of this article originally appeared in the 14 December 2017 edition of finweek.

The compelling case for technological optimism

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PortableComputers

In September last year, I visited the Computer History Museum in Mountain View, California. The museum is dedicated to preserving and presenting all aspects of the computer revolution, from its roots in the twentieth century to self-driving cars today. What is remarkable is to observe, while walking through the more than 90000 objects on display, the profound change in technology over the last three decades. The mobile computing display, I thought, summarised this change best, showing the first laptop computers of the 1980s (see image above) to a modern-day iPhone. But what also became clear from the exhibitions was that those ‘in the know’ at the start of the revolution were right about the transformational impact of computers, but almost certainly wrong about the way it would affect us.

We are now at the cusp of another revolution. Artificial intelligence, led by remarkable innovations in machine learning technology, is making rapid progress. It is already all around us. The image-recognition software of Facebook, the voice recognition of Apple’s Siri and, probably most ambitiously, the self-driving ability of Tesla’s electric cars all rely on machine learning. And computer scientists are finding more applications every day, from financial markets – Michael Jordaan recently announced a machine learning unit trust – to court judgements – a team of economists and computer scientists have shown that the quality of New York verdicts can be significantly improved with machine learning technology.  Ask any technology optimist, and they will tell you the next few years will see the release of new applications that we currently cannot even imagine.

But there is a paradox. Just as machine learning technology is taking off, a new NBER Working Paper by three economists, Erik Brynjolfsson, Chad Syverson and Daniel Rock affiliated to MIT and Chicago, show something peculiar: a decline in labour productivity over the last decade. Across both the developed and developing world, growth in labour productivity, meaning the amount of output per worker, is falling. Whereas one would expect that rapid improvements in technology would boost total factor productivity, boosting investment and raising the ability of workers to build more stuff faster, we observe slower growth, and in some countries even stagnation.

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This has led some to be more pessimistic about the prospects of artificial intelligence, and in technological innovation more generally. Robert Gordon, in his ‘The Rise and Fall of American Growth’, argue that, despite an upward shift in productivity between 1995 and 2004, American productivity is on a long-run decline. Other notable economists, including Nicholas Bloom and William Nordhaus, are somewhat pessimistic about the ability of long-run productivity growth to return to earlier levels. Even the Congressional Budget Office in the US has reduced its 110-year labour productivity forecast, from 1.8 to 1.5%. On 10 years, that is equivalent to a decline of $600 billion in 2017.

How is it possible, to paraphrase Robert Solow in 1987, that we see machine learning applications everywhere but in the productivity statistics? The simplest explanation, of course, is that our optimism is misplaced. Has Siri or Facebook’s image recognition software really made us that more productive? Some technologies never live up to the hype. Peter Thiel famously quipped: ‘We wanted flying cars, instead we got 140 characters’.

Brynjolfsson and co-authors, though, make a compelling case for technological optimism, offering three reasons for why ‘even a modest number of currently existing technologies could combine to substantially raise productivity growth and societal welfare’. One reason for the apparent paradox, the authors argue, is the mismeasurement of output and productivity. The slowdown in productivity of productivity in the last decade may simply be an illusion, as most new technologies – think of Google Maps’ accuracy in estimating our arrival time – involve no monetary cost. Even though these ‘free’ technologies significantly improve our living standards, they are not picked up by traditional estimates of GDP and productivity. A second reason is that the benefits of the AI revolution are concentrated, with little improvement in productivity for the median worker. Google (now Alphabet), Apple, and Facebook have seen their market share increase rapidly in comparison to other large industries. Where AI was adopted outside ICT, these were often in zero-sum industries, like finance or advertising. A third, and perhaps most likely, reason is that it takes a considerable time to be able to sufficiently harness new technologies. This is especially true, the authors argue, ‘for those major new technologies that ultimately have an important effect on aggregate statistics and welfare’, also known as general purpose technologies (GPT).

There are two reasons why it takes long for GPTs to be seen in the statistics. It takes time to build up the stock necessary to have an impact on the aggregate statistics. While mobile phones are everywhere, the applications that benefit from machine learning are still only a small part of our daily lives. Second, it takes time to identify the complementary technologies and make these investments. ‘While the fundamental importance of the core invention and its potential for society might be clearly recognizable at the outset, the myriad necessary co-inventions, obstacles and adjustments needed along the way await discovery over time, and the required path may be lengthy and arduous. Never mistake a clear view for a short distance.’

As Brynjolfsson and friends argue, even if we do not see AI technology in the productivity statistics yet, it is too early to be pessimistic. The high valuations of AI companies suggest that investors believe there is real value in those companies, and it is likely that the effects on living standards may be even larger than the benefits that investors hope to capture.

Machine learning technology, in particular, will shape our lives in many ways. But much like those looking towards the future in the early 1990s and wondering how computers may affect our lives, we have little idea of the applications and complementary innovations that will determine the Googles and Facebooks of the next decade. Let the Machine (Learning) Age begin!

An edited version of this article originally appeared in the 30 November 2017 edition of finweek.