Endogenising economists

I’m afraid I was underwhelmed by The Power of Creative Destruction by Philippe Aghion & his co-authores Céline Antonin and Simon Bunel. The book falls between the two stools of textbook for econ courses and overview for the general reader. It is based on course notes and has that tone (and charts/tables/referencing of the literature), but all the technical apparatus students would need has been removed. Professor Aghion is of course a terrific economist who has published lots of excellent papers on growth and innovation. However, that too is a downside here, as the book is the Aghion view of the world rather than a broader survey of the economics of innovation and growth.

The oddest aspect of this is his contrast between the Solow neoclassical growth model and the ‘new paradigm’ of Aghion-style Schumpeterian growth. Set aside this claim to novelty, which might cause many other Schumpeterian economists to raise an eyebrow; there is nothing here about the competing workhorse approach of endogenous growth models. Paul Romer makes it to the footnotes, Paul Krugman’s increasing returns models not that far, Ken Arrow too isn’t mentioned. Joseph Stiglitz fares best out of the prominent thinkers about markets, growth and development in the context of increasing returns. The book is more or less an account of Prof Aghion’s own research, and his own papers (excellent as they are) are the most-often cited. So while accepting the importance of creative destruction and new ideas, the absence of much about information and ideas is pretty glaring. There is a chapter about R&D but little about the economic models endogenizing it.

I could quibble about other features too, such as relying on patents to measure innovation, but it’s this missing aspect of the dynamics – the scope for endogenous, self-fulfilling or -averting phenomena – that seems a particularly big gap. The discussion of intellectual property lacks any nuance: it is simply asserted that patent protection is essential. Of course it is, but that isn’t the point of the present policy debate, which is exactly about whether the right balance between patent-protected monopoly and broad access to new ideas has been struck.

41eUnCMDnVL._SX329_BO1,204,203,200_On the other hand, I also read Carlo Rovelli’s Helgoland and warmly recommend it. It sets out his view about quantum phenomena as manifestations of the fact that reality is relational: nothing is experienced, perceived, measured, or understood except in relation to everything else. “Every vision is partial. There is no way of seeing reality that is not dependent on a perspective. …. The actor of this process is not a subject distinct from phenomenal reality, outside it, nor any transcendent point of view; it is a portion of that reality itself.. …. Relations make up our ‘I’, as our society, our cultural, spiritual and political life.”

This appeals strongly to my intuition and echoes the argument of my forthcoming book, Cogs and Monsters, one of whose key threads is the point that economists can not stand outside the society they seek to analyse. Even the economists are endogenous.



4 thoughts on “Endogenising economists

  1. I read these lines and I cannot help thinking Ms Coyle has simply not read the Power of Creative Destruction. The best I can do is to quote two prominent economists, Joel Mockyr and Jean Tirole who, unlike Ms Coyle have taken the time to read the book.
    Enisse Kharroubi

    “Anyone curious about where modern capitalism is going and whether economic growth can be sustained should read this book. In accessible prose, based on cutting-edge economic analysis, the authors dissect the dynamics of the modern economies. They show brilliantly how capitalism in the 21st Century is indeed as creative as it is destructive, and how innovation will affect modern economies and hence the life of every human on the planet, for better and for worse. Deeply researched and intelligently written, this is a genuine tour de force.”
    Joel Mokyr, Northwestern University

    “Accelerating technological change, global warming, pandemics, individual and national stagnation, over-indebtedness: this century decidedly provokes anxiety. Armed with legitimate concerns, anti-globalization protestors and neo-Luddites look inwards and denigrate innovation. The Power of Creative Destruction offers another vision, more persuasive and based on the innovation that creates wealth and jobs. Philippe Aghion, Céline Antonin, and Simon Bunel dismantle contemporary myths about such economic phenomena as secular stagnation and the impact of automation on employment. They show the need for competition and the fight against rents. They advocate a regulated capitalism that will allow us to keep society prosperous and the planet green. They explain, in short, how to manage the creative destruction that over the past two centuries has brought to our society a previously unimaginable prosperity. Provocative and rigorous, this book is an important milestone in our reflections on the future of our societies. An essential read.”
    Jean Tirole, Nobel Laureate, Toulouse School of Economics,

  2. that economists can not stand outside the society they seek to analyse.

    Isn’t that Heisenberg’s idea ? (Not the Breaking Bad one of course……)

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