His books have been translated into over ten languages. Apollo's Arrow: The Science of Prediction and the Future of Everything was a national bestseller and finalist for the 2007 Canadian Science Writers' Award. Economyths: Ten Ways Economics Gets It Wrong was a finalist for the 2011 National Business Book Award.
Criticism of use of mathematical models
A consistent topic in Orrell’s work is the limitations of mathematical models, and the need to acknowledge these limitations if we are to understand the causes of forecast error. He argues for example that errors in weather prediction are caused primarily by model error, rather than the butterfly effect.[2]Economic models are seen as particularly unrealistic.[3] In Truth or Beauty: Science and the Quest for Order, he suggests that many such theories, along with areas of physics such as string theory, are motivated largely by the desire to conform with a traditional scientific aesthetic, that is currently being subverted by developments in complexity science.[4]
Quantum theory of money and value
Orrell is considered a leading proponent of quantum finance and quantum economics.[5] In The Evolution of Money[6] (coauthored with journalist Roman Chlupatý) and a series of articles[7][8][9] he proposed a quantum theory of money and value, which states that money has dualistic properties because it combines the properties of an owned and valued thing, with those of abstract number. The fact that these two sides of money are incompatible leads to its complex and often unpredictable behavior. In Quantum Economics: The New Science of Money he argued that these dualistic properties feed up to affect the economy as a whole.[10]
Books
Orrell, David (2023). Quantum Economics and Finance: An Applied Mathematics Introduction (3rd ed.). Panda Ohana. ISBN978-1916081611.
Orrell, David (2022). Money, Magic, and How to Dismantle a Financial Bomb: Quantum Economics for the Real World. Icon. ISBN978-1785788284.
Orrell, David (2021). Instant Economics: Key Thinkers, Theories, Discoveries and Concepts. Welbeck. ISBN978-1787394193.
Orrell, David (2021). Behavioural Economics: Psychology, Neuroscience, and the Human Side of Economics. Icon. ISBN978-1785786440.
Orrell, David (2020). A Brief History of Money: 4,000 Years of Markets, Currencies, Debt and Crisis. Welbeck. ISBN978-1785788284.
Orrell, David (2018). Quantum Economics: The New Science of Money. Icon. ISBN978-1785782299.
Orrell, David (2017). Economyths: 11 Ways Economics Gets It Wrong. Icon. ISBN978-1848311480. Revised and extended edition of 2010 book.
Wilmott, Paul; Orrell, David (2017). The Money Formula: Dodgy Finance, Pseudo Science, and How Mathematicians Took Over the Markets. Wiley. ISBN978-1119358619.
Orrell, David; Chlupatý, Roman (2016). The Evolution of Money. Columbia University Press. ISBN978-0231173728.
Orrell, David (2012). Truth or Beauty: Science and the Quest for Order. Yale University Press. ISBN978-0300186611.
^Orrell, David; McSharry, Patrick (2009). "System economics: Overcoming the pitfalls of forecasting models via a multidisciplinary approach". International Journal of Forecasting. 25 (4): 734–743. doi:10.1016/j.ijforecast.2009.05.002.
^"Schrödinger's markets". The Economist. Nov 6, 2021.
^Angel, James (2017). "The Evolution of Money. By David Orrell and Roman Chlupatý". Business History Review. 91 (2): 397–399. doi:10.1017/S0007680517000800. S2CID158834606.
^Orrell, David (2016). "A Quantum Theory of Money and Value". Economic Thought. 5 (2): 19–28.
^Orrell, David (2017). "A Quantum Theory of Money and Value, Part 2: The Uncertainty Principle". Economic Thought. 6 (2): 14–26.