First up, from Marginal Revolution, October 13:
The Nobel prize goes to Joel Mokyr, the economic historian of the industrial revolution and the growth theorists Phillippe Aghion and Peter Howitt best known for their Schumpeterian model of economic growth.
Here’s a good quote from Nobelist Joel Mokyr’s the Lever of Riches.
Yet the central message of this book is not unequivocally optimistic . History provides us with relatively few examples of societies that were technologically progressive. Our own world is exceptional, though not unique, in this regard. By and large, the forces opposing technological progress have been stronger than those striving for changes. The study of technological progress is therefore a study of exceptionalism, of cases in which as a result of rare circumstances, the normal tendency of societies to slide toward stasis and equilibrium was broken. The unprecedented prosperity enjoyed today by a substantial proportion of humanity stems from accidental factors to a degree greater than is commonly supposed. Moreover, technological progress is like a fragile and vulnerable plant, whose nourishing is not only dependent on the appropriate surroundings and climate, but whose life is almost always short. It is highly sensitive to the social and economic environment and can easily be arrested by relatively small external changes. If there is a lesson to be learned from the history of technology it is that Schumpeterian growth, like the other forms of economic growth, cannot and should not be taken for granted.
Aghion and Howitt’s Schumpeterian model of economic growth shares with Romer the idea that the key factors of economic growth must be modelled, growth is thus endogenous to the model (unlike Solow where growth is primarily driven by technology an unexplained exogenous factor). In Romer’s model, however, growth is primarily horizontally driven by new varieties whereas in Aghion and Howitt growth comes from creative destruction, from new ideas, technologies and firms replacing old ideas, technologies and firms.
Thus, Aghion and Howitt’s model lends itself to micro-data on firm entry and exit of the kind pioneered by Haltiwanger and others (who Tyler and I have argued for a future Nobel). Economic growth is not just about new ideas but about how well an economy can reallocate production to the firms using the new ideas. Consider the picture below, based on data from Bartelsman, Haltiwanger, and Scarpetta. It shows the covariance of labor productivity and firm size. In the United States highly productive firms tend to be big but this is much less true in other economies. In the UK during this period (1993-2001) the covariance of productive and big considerably less than half the rate in the United States. In Romania at this time the covariance was even negative–indicating that the big firms were among the least productive. Why? Well in Romania this as the end of the communist era when big, unproductive government run behemoths dominated the economy. As Romania moved towards markets the covariance between labor productivity and firm size increased. That is the economy became more productive as it reallocated labor from low productivity firms to high productivity firms....
....MUCH MORE
And via NobelPrize.org, October 13:
The Sveriges Riksbank Prize in Economic Sciences in Memory of Alfred Nobel 2025
Press release
English
English (pdf)
Swedish
Swedish (pdf)
13 October 2025
The Royal Swedish Academy of Sciences has decided to award the Sveriges Riksbank Prize in Economic Sciences in Memory of Alfred Nobel 2025 to Joel Mokyr, Philippe Aghion and Peter Howitt
“for having explained innovation-driven economic growth”
with one half to
Joel Mokyr
Northwestern University, Evanston, IL, USA, Eitan Berglas School of Economics, Tel Aviv University, Israel“for having identified the prerequisites for sustained growth through technological progress”
and the other half jointly to
Philippe Aghion
Collège de France and INSEAD, Paris, France, The London School of Economics and Political Science, UKPeter Howitt
Brown University, Providence, RI, USA“for the theory of sustained growth through creative destruction”
They show how new technology can drive sustained growth
Over the last two centuries, for the first time in history, the world has seen sustained economic growth. This has lifted vast numbers of people out of poverty and laid the foundation of our prosperity. This year’s laureates in economic sciences, Joel Mokyr, Philippe Aghion and Peter Howitt, explain how innovation provides the impetus for further progress.Technology advances rapidly and affects us all, with new products and production methods replacing old ones in a never-ending cycle. This is the basis for sustained economic growth, which results in a better standard of living, health and quality of life for people around the globe.
However, this was not always the case. Quite the opposite – stagnation was the norm throughout most of human history. Despite important discoveries now and again, which sometimes led to improved living conditions and higher incomes, growth always eventually levelled off.
Joel Mokyr used historical sources as one means to uncover the causes of sustained growth becoming the new normal. He demonstrated that if innovations are to succeed one another in a self-generating process, we not only need to know that something works, but we also need to have scientific explanations for why. The latter was often lacking prior to the industrial revolution, which made it difficult to build upon new discoveries and inventions. He also emphasised the importance of society being open to new ideas and allowing change.
Philippe Aghion and Peter Howitt also studied the mechanisms behind sustained growth. In an article from 1992, they constructed a mathematical model for what is called creative destruction: when a new and better product enters the market, the companies selling the older products lose out. The innovation represents something new and is thus creative. However, it is also destructive, as the company whose technology becomes passé is outcompeted.
In different ways, the laureates show how creative destruction creates conflicts that must be managed in a constructive manner. Otherwise, innovation will be blocked by established companies and interest groups that risk being put at a disadvantage.
“The laureates’ work shows that economic growth cannot be taken for granted. We must uphold the mechanisms that underly creative destruction, so that we do not fall back into stagnation,” says John Hassler, Chair of the Committee for the prize in economic sciences.
Illustrations
The illustrations are free to use for non-commercial purposes. Attribute ”© Johan Jarnestad/The Royal Swedish Academy of Sciences”....
....MORE (illustration links)
Here's NobelPrize.org's backgrounder:
From stagnation to sustained growth
