The iconic earthrise photograph was taken in 1968. In 2026 the Artemis II crew flew around the dark side of the moon and took another stunning image (see here for more). Notice the northern lights, and Venus. And it was taken with an iPhone.
After the collapse of communism there was a well-known problem within the environmental movement,
“Creating Green parties in much of Eastern Europe was a uniquely difficult process, in large part because of “melons” and “cucumbers” (melons are green on the outside but red inside; cucumbers are green all the way through” (Feffer, J., 1999, Shock Waves, p.171)
In October 2025 Nature published the following article:
It’s really quite remarkable that the world’s most prestigious scientific journal published what is little more than a consultanty op-ed.
Here is a TedX talk about the doughnut model:
Some spinning donuts (you see! it is meant to be measured after all!):
Yes! At last… Watch national Doughnuts changing over time. Published today: 150 countries, 1992-2015. Eye-opening & powerful work by @AndrewLFanning & coauthors. Check out the website – an incredible teaching resource… https://t.co/8D59jZ9TMppic.twitter.com/PwMYZwHc3g
Andrew Lilico: ‘Doughnut Economics’ by Kate Raworth, June 24th 2024 – including this zinger: “I can safely say I have never hated a book more than this one… It makes assertion after assertion about economics that is simply false, and even if the initial assertion were true, what is done with that assertion would still be wrong… We don’t need to reinvent economics. We just need to understand it properly and apply it correctly and with imagination. Unfortunately, reading this book will not help you to achieve any of that.”
And here is an academic review:
Acharya, Ashruta and Geloso, Vincent and Psurek, Aleksander, “The Hole in the Doughnut: Formalizing and Testing a Key Model of Degrowth” (July 21, 2025). GMU Working Paper in Economics No. 25-23 – From the abstract: “we find no empirical support for the model’s core prediction. If anything, the sign is often the opposite of the one predicted.”
Degrowth
Recently there has been increased attention to the concept of “degrowth”. I’m not convinced.
Degrowth can work — here’s how science can help, Nature, December 12th 2022 – the authors claim that economic growth is based on production for its own sake and the necessary depletion of natural resources required to fuel it. But this is a fundamental misconception of economics, which is about increasing utility (i.e. people’s subjective judgment of what improves the quality of their life) in the most efficient way possible. As Sam Bowman said, economic growth is about “innovations that use fewer resources & less labour to produce more wellbeing – the [exact] thing the blurb says we should do”.
Degrowth and the Monkey’s paw, by Stian Westlake, Works in Progress, May 15th 2023 – Stian Westlake points out that “the UK has been remarkably successful in weaning itself off its growth addiction. I’m surprised that supporters of degrowth don’t celebrate these charts more.”
Ivan Savin, Jeroen van den Bergh, 2024, “Reviewing studies of degrowth: Are claims matched by data, methods and policy analysis?“, Ecological Economics, Volume 226 – the authors provide a comprehensive survey of 561 articles from the degrowth literature. It found that: “the large majority (almost 90%) of studies are opinions rather than analysis; few studies use… data… most studies offer ad hoc and subjective policy advice… various studies represent a “reverse causality” confusion, i.e. use the term degrowth not for a deliberate strategy but to denote economic decline (in GDP terms) resulting from exogenous factors or public policies; [and] few studies adopt a system-wide perspective – instead most focus on small, local cases without a clear implication for the economy as a whole.”
Paul Erlich’s ‘The Population Bomb’ warned that we would be unable to feed a growing global population and that the solution was to reduce birthrates. He said “we can no longer afford merely to treat the symptoms of the cancer of population growth; the cancer itself must be cut out”. Suggested methods included adding sterlients to the food supply (see Ritchie 2024, p.155). That didn’t happen, but fears about overpopulation were so influential it led to the sterilisation of 8 million Indian men. And yet as of January 2023 Paul Erlich was still receiving media coverage when warning about unsustainable growth. Note:
Paul Erlich passed away in 2026 and I found this response particularly poignant.
As the lecture argues, we are more than capable of providing good living standards for the population. And if you are worried about exponential population growth then don’t be. Population growth has fallen from over 2% in the 1960s to 0.8% by 2022. We have now passed “peak child”, with the highest number of children peaking in 2017. The global population is expected to stabilise at 11bn. It turns out that when you are successful at reducing poverty people tend to have fewer children. We have sufficient natural resources as well as the socio-economic system necessary to support a thriving global population. Like John Lennon, we do not need to be concerned about overpopulation:
Instructor resource: Market Applications Solutions, December 2022
Recommended audio:
Special Episode 12: Jen Dirmeyer – What Do Markets Do For Us? The Curious Task, July 27th 2022 – Jen Dirmeyer talks about the marvel of market order, with a particular focus on the incredible coordination that takes place to deliver consumer goods in contemporary society. She points out that supply curves reflect the best alternative use of resources and demand curves reflect the best alternative way of satisfying consumer needs, and in doing so rest on the same underlying logic. Also, I really liked Jen’s emphasis on an important downside of the reliance on market exchange – people with higher incomes, or higher budgets, are at a significant advantage over those less fortunate. This is indeed a social problem but the choice between economic systems is a choice between one that emphasises economic power versus one that emphasises political power. The former may be more egalitarian overall because economic wealth creation is positive sum, and therefore one person’s advantage need not come at the expense of another’s.
Human civilisation faces many threats. Some of them (e.g. climate change, AI and nuclear war) have the potential to destroy us and our planet. Other types of risk are less existential but still highly damaging, such as pandemics. Covid revealed lots of vulnerabilities in our capacity to manage problems, and one temptation is to fix specific points of failure. This might improve our resilience for future pandemics, but who is to say whether that is the threat that we face? As Mark Pennington has said, “If there is reason to doubt the efficacy of centralised governance in strategic risk planning then the most effective and multipurpose ‘insurance policy’ that might account for the broadest range of future risks may be to sustain robust levels of economic growth. The resources generated by such growth may provide resilience against risks from multiple directions.” In other words, the best insurance policy against unknown threats is greater wealth.
Here is a good Economist article surveying “the new tech worldview” exhibited by the likes of Peter Thiel and Patrick Collison.
Ep. 76: Steve Horwitz — What Drives Progress?, The Curious Task, Jan 13th 2021 – this interview touches on several themes from my teaching, including rising living standards, permissionless innovation, and the great stagnation. I also find it poignant to listen to – I knew Steve personally and he passed away just 6 months after this recording.
Here is Tyler Cowen talking about Stubborn Attachments:
Here is Aubrey De Grey claiming that the first person to live to the age of 1,000 has already been born:
Textbook Reading: Chapter 7 (Section 7.3; pp. 216-225)
“Most money is purely theoretical. It’s all in computers, backed by trust and confidence.” Jack Reacher (Child, L., 2012, A Wanted Man, Bantam Books, p.520
Can someone really understand crypto currencies and the future of digital money without having a solid grasp of why money even exists? This topic is a great example of why historic knowledge and theoretical clarity are crucial when involved in fast changing industries – it provides a benchmark to verify the bold claims made by industry practitioners. The purpose of this lecture is to gain a deep understanding of what money is and how it has evolved.
“Pierpaolo Barbieri on Latin American FinTech“, Conversations with Tyler, May 19th 2021 – in particular this shows the importance of knowing financial and economic history for tech founders.
“Brian Armstrong”, Conversations with Tyler, February 2021 – a great overview of how the CEO of Coinbase sees the crypto industry.
Hashpower – Part 1, Investors Field Guide – a fantastic early introduction to blockchain technology and potential of crypto assets.
Recommended video:
This video is very long, but if you are totally new to concepts like blockchain, bitcoin and NFTs and want a thorough account of the history and development, in a well produced an informative documentary that takes a highly skeptical and cynical approach, I recommend this highly.
For a more positive view of NFTs, an identification of the context in which they’ve emerged (post global financial crisis and great stagnation), and subjectivist approach to value, see this X/Twitter thread.
Learning Objectives: Understand the origins of money and how this can be used to understand the role of central banks in a fiat money system, as well as to navigate the crypto landscape.
Cutting edge theory: Making assessments of digital and crypto currencies.
Many consider inequality to be a key social problem, and yet economics is all about delving beyond intuitions. Do we have good data on what has happened to inequality over time? What type of inequality matters? Is there an important trade-off to consider when confronting inequality? The answers to these questions may be controversial, but they are relevant and important.
Imagine trying to answer the following question:
A study by Gimpelson and Treisman (“Misperceiving inequality“, NBER Working Paper 21174) found that:
In 29 of the 40 countries a majority of respondents who ventured a guess guessed wrong.
In 29 countries, the leading choice attracted fewer than 50 percent of those who guessed.
In almost three quarters of countries, most respondents who thought they could identify the general pattern of inequality got it wrong.
“loads of the objections people have to inequality, if there is any truth to them, are probably actually objections to perceptions of inequality, which may be more driven by media coverage than reality. If that’s true, then trying to reduce inequality in fact is a waste of time — you should try to get the media to talk about it less instead”
I think it’s important to recognise that we simply don’t have sufficient wealth for everyone to have a reasonable standard of living. Even if you somehow confiscated the entire global GDP and shared it equally everyone would only get a monthly amount of $1,191 for one year. ($117.2 trillion between 8.3 billion people). This is a reasonable income for many parts of the world, but would lock us in to present consumption power. Would you have wanted your parents to have made a similar trade back in 1985, which would be $12 trillion between 5 billion = $2,400, i.e. less than $7 per day? (I’ve used income, rather than wealth, because the data is better. These figures should also be adjusted for purchasing power, but it’s only meant as a back of the envelope exercise).
Vincent Geloso has challenged some of the work done by Gabriel Zucman. You can read more here:
Thread: Let us be clear — the work of Gabriel Zucman should be taken with a major/huge grain of salt. Largely because he and his colleagues have been sloppy as hell. I will not mince words here and list the litany of sloppiness #econtwitterhttps://t.co/4icOSMcZc7
Vincent has also criticised this chart showing the supposed derailment between productivity and wage growth:
According to Scott Winship, “the charts used to demonstrate the supposed breakdown of this relationship obscure the reality that productivity and hourly compensation continue to track each other”. The main problem is that the chart shows family income rather than hourly pay (or, better still, hourly compensation). This chart shows a more like-for-like comparison:
I’ve often seen students link to this graph:
On initial inspection this graph looks highly dubious:
The selection of countries is suspicious (why exclude countries that have more income inequality than the US, and why include Finland but not Singapore?)
The “Index of health and social problems” looks arbitrary and prone to manipulation
However I’ve not been able to find the actual source yet. I assume it comes from ‘The Spirit Level‘, which I believe has been quite firmly debunked:
Snowden, Christopher “The Spirit Level 10 Years On” – When The Spirit Level was released back in 2009 it caught the imagination of the public, by providing empirical evidence to claim that rising inequality was a serious problem. Chris Snowden debunked a lot of the analysis in his book, The Spirit Level Delusion, and this short blog post updates the data to show that not only was the original analysis flawed, but it no longer holds.
Oxfam are also renowned for using dodgy statistics. For example:
Here is an article from Marginal Revolution providing context and assessment of the tribunal that found Next had broken the Equality Act of 2010.
Aside: Sometimes I’m asked what I really think about inequality. Really? That the there is no ethical basis for being concerned about inequality per se. In fact, the best argument to take it seriously is because low educated and xenophobic natives, who have hit the jackpot in where to be born, hold civilised (i.e. cosmopolitan) society to ransom by threatening extremism of various sorts and civil disorder unless their concerns are met. Ideally, we prevent all that from happening by ensuring nominal income stability and productivity growth. But there’s no moral basis for “equalising” arbitrary distributions. Our moral concerns should be focused on eradicating poverty and destitution; and ensuring a competitive market economy that rewards wealth creation and limits rent seeking. If forcing Charles Koch to emigrate improves your metrics of success, then I demur.
My view of the inequality debate is informed by “Fast” Eddie Felson, from ‘The Hustler’.
Luxury
I was very disappointed when Rimowa were sold to LVMH and switched from being a high quality travel company to part of a luxury brand. As Michael Story said,
As per Mary Douglas I view high status consumption goods as part of our need to separate ourselves from others, and signal which groups we belong to. I don’t play those games (at least not on those margina) and think it’s a bit of a waste of resources to do so. But I respect people who admire beauty, design, and the pursuit of aesthetics. Live and let live, I say. But tax the hell out of them.
I largely share Martin Wolf’s (2023, p. 283) criticisms of a universal basic income (UBI) in that by being so intentionally ill targeted it creates too much of a waste of limited public funding – “A UBI at a high enough level to render targeted assistance to those who are vulnerable, needy, and deserving would be unaffordable, while a UBI that is affordable would benefit many people who do not need the money and fail to benefit important services and people who need more than they have now.” I prefer a moderate income tax with generous allowances and incentive compatible welfare payments.
We can think of the state as an “insurer of last resort”, with its access to taxation permitting favourable terms for mitigating risk (p. 274). By being able to compel people it also avoids the “adverse selection” problem that befells individuals in particular need. This helps to explain the main economic justification for a well functioning welfare state (p. 276):
Incomplete private insurance
Incomplete capital markets
Note though that improving the market in those two areas would reduce the need for widespread social protection.
Slavery
For an overview of the debate surrounding the role of slavery in the rise of the West see:
“Claudia Goldin on Inequality“, Conversations with Tyler, Oct 6th 2021 – this conversation focuses on gender inequality and the labour market in particular, and although some of the discussion is aimed at graduate students they pose some excellent questions to reflect on.
“Thomas Piketty on the politics of equality“, Conversations with Tyler, April 20th 2022 – Tyler challenges Piketty on some of the political economy arguments relating to progressivism and does a good job putting Piketty’s work into a history of economic thought perspective.
Ep. 28: Vincent Geloso — Should We Care About Inequality?, The Curious Mind, February 12th 2020 – Vincent talks about which types of inequality are most important to reduce and discusses some of the academic literature that has contributed to our understanding of the issue. His main claim is the need to build a dashboard and avoid overly simplistic explanations or solutions.
“Roland Fryer on Race, Diversity, and Affirmative Action” EconTalk, September 4th 2023 – Fryer explains how the study of discrimination can be approached in three main ways: preference based (e.g. Gary Becker); information based (e.g. Kenneth Arrow); and structural (i.e. sociologists). He summarises his career, talks fondly about the influence of his grandmother, and the importance of combining intuitive wisdom with rigorous data analysis. His main point is that wage discrepancies are not necessarily discrimination, and companies often lack the curiosity or capability to use the data at their disposal to really understand the problems they face. This helps to explain why the benefit of diversity training is zero, and the impact of mandatory diversity training is possibly negative.
Recommended film:
You can see the trailer to Parasite here:
Here are what I consider to be a conventional and alternative take on the movie:
I also recommend the 2021 BBC series Chloe. As this Guardian review demonstrates, when it says “I hope she gets away with everything”, some viewers can actively root for despicable behaviour if it’s presented as a commentary on inequality.
During the class I say that it is inconceivable to have an American movie that portrays wealthy people in a positive light. Potential counter examples include:
The Dark Knight Rises (2012) – the good guy is a billionaire, the police are heroes, and Bane occupies Wall st… I’m not sure the Batman is a positive depiction of wealth, but it’s certainly a very rare example of a movie that is more right wing than left wing.
One Day (2023) – Dexter is obnoxious and his wealth and priviledge is not portrayed in a positive light, but we certainly sympathise with him and, as this Guardian review points out, his “wide-boy charisma and frightful yet endlessly forgivable privilege are perfectly pitched; I forgive him a thousand times. His poshness is neither glossed over nor glamorised; it is simply integral.”. Dexter’s dad is a good man, who we sympathise with, and we don’t hold his wealth against him. That’s something, I guess. (Note this isn’t American, or a movie, but I’m open to anything!)
Saltburn (2023) – this film is a challenging watch but very good (the line “she’d do anything for attention” is perhaps one of the funniest I’ve ever heard). If you’ve read Engleby then I think you lose a large part of its power and originality, and if you understand the Solow growth model you may be confused by the ending. In terms of its implication for inequality, you do sympathise with the rich, and it sort of parallels Parasite’s warning about trust and naivety. But Oliver isn’t poor (despite his bad accent, Prescott is fine!), and the Catton’s aren’t portrayed as having earned their wealth. They are not horrible people but we do laugh at their buffoonery and aren’t asked to respect them. Felix isn’t atrocious but he’s manipulative. Like Parasite, it shows the rich as victims of those less fortunate, and unlike Chloe we’re not supposed to cheer them on. But it doesn’t portray wealthy people in a positive light.
Loot (2022) – I haven’t seen this but the basic premise (I think) is that it is possible to feel sympathy and even affection for a multi-billionaire. And yet, onlyif they become a philanthropist. And also, the husband is the villain.
Finally, if you like the plot device from Parasite, with people appearing from underground captivity, confronting a confusing situation as a result of odd costumes, leading to violence and mayhem… then I recommend Emir Kusturica’s Underground (1995):
Learning Objectives: Survey the latest empirical work on inequality and relate this to wider social issues.
“Stagnation, my dear boy, what is more soul-destroying than stagnation?” C.S. Lewis, The Great Divorce
In the lecture I say that “start up rates are falling” but that was from a 2014 paper that I wrote. Data from the US Census Bureau suggests that since then they have been rising.:
According to Max Grossman, as of 2021 half of all scientific papers that had even been published had come in the last 12 years, and yet much less than half of scientific progress had happened in that same period.
Here’s a great image showing a long-term timeline of technology (but notice the gap between smartphones and Now):
Here is a video showing the opening of the Empire State Building:
And don’t forget just how amazing it was when people saw the iPhone for the first time:
For more on whether Jeanne Calment really was the oldest person ever, see Wikipedia. Saul Newman is a demographer who has found that the places that have lots of people living over the age of 100 tend to be riddled by clerical errors and pension fraud – he won an Ig Nobel in 2024. This chart shows that once birth certificates became widely adopted far fewer people claimed to be very old.
Here is The Economist on how claims of people living to a great age decline when birth certificates are introduced.
As Alec Strpp says, “Areas of the world with people claiming to be 110+ years old are actually just places with poor record keeping and a lot of pension fraud.”
Isn’t it weird how you used to be able to easily tell when a TV series was set from the fashion? And yet long running recent shows are much harder to date. For example,
I was saddened to learn recently that same amount of time had passed between the first human airplane flight and the first human spaceflight as between the first spaceflight and 2018 (see here).
Here is a good defense of the importance of aviation:
“It has offered people the opportunity to migrate from one country to another It lets them return home to visit their families. It has provided jobs. Driven innovations in new technologies. It has made our societies more diverse and multicultural and has allowed us to experience the beauty of other countries. these are experience I want everyone in the world to have access to” (Ritchie, 2024, p.99)
To some extent this lecture is about trying to work out what happened in the early 1970s. This website poses the same question: https://wtfhappenedin1971.com/
Some interesting (and possibly related) facts about this period:
The lecture provided some pessimistic views on transformative breakthroughs. But every now and then I notice the power of steady, incremental progress. For example:
Are we running out of ideas? Freakonomics, November 2017 – the key points are to consider whether productivity is happening but isn’t being captured by GDP due to spillovers
Textbook Reading: Chapter 1 (Section 1.2, pp. 16-29)
The purpose of this session is to realise that value comes from satisfying people’s needs, and that this leads to a broad and insightful realisation that:
Competition is when anyone else tries to satisfy the same customer needs that you do.
Innovation is trying to find better ways to satisfy your customers needs.
Entrepreneurship is successful when you understand your customers needs better than they do.
Steve Job’s famous advice was to not listen to your customers. This is in contrast to Tyler Cowen’s “law of interesting content” – which is that interviewers should have the conversation that they want, not what they think their listeners want.
I think it is incorrect to say that the reason diamonds are more valuable than water is because they are scarcer. This would be using the term “scarcity” to refer to a relative amount of present consumption, but that is obtuse. We normally use scarcity as a collective assessment of the availability of a good. In other words, there is no such thing as personal scarcity.
Christensen, C., et al, 2016, “Know Your Customers’ “Jobs to Be Done”” Harvard Business Review – the seminal account of thinking about service provision and how to understand your work from the perspective of your customers.
Learning Objectives: Link a thorough concept of value with implications for competition and innovation. Derive demand curves.
Cutting edge theory: Jobs to be done
Focus on diversity: Economists typically take preferences as given, but we can provide a theory of demand reflecting “the individual’s commitment to an intelligible universe” (p.52), where goods are considered to be a visible reflection of culture. Mary Douglas (1921-2007) was one of the world’s most admired social anthropologists, and her 1979 book, ‘The World of Goods’, provided a rich and compelling illumination of consumption patterns.
The training scene from Rocky IV demonstrates the difference between the USSR (technologically sophisticated but lacking in heart) and the US (backward but free).