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This book studies the methodological revolution that has resulted in economists’ mathematical market models being exported across the social sciences. The ensuing process of economics imperialism has struck fear into subject specialists worried that their disciplinary knowledge will subsequently count for less. Yet even though mathematical market models facilitate important abstract thought experiments, they are no substitute for carefully contextualised empirical investigations of real social phenomena. The two exist on completely different ontological planes, producing very different types of explanation.
In this deeply researched and wide-ranging intellectual history, Matthew Watson surveys the evolution of modern economics and its modelling methodology. With its origins in Jevons and Robbins and its culmination in Samuelson, Arrow and Debreu, he charts the escape from reality that has allowed economists’ hypothetical mathematical models to speak to increasingly self-referential mathematical truths. These are shown to perform badly as social truths, consequently imposing strict epistemic limits on economics imperialism.
The book is a formidable analysis of the epistemic limitations of modern-day economics and marks a significant counter to its methodology’s encroachment across the wider social sciences.
The most thorough and persuasive account that exists of the origins of the cognitive authority of modern economics – and the sometimes rather tenuous claims on which that authority rests. A brilliant achievement that could really only have been written by Matthew Watson but which we can all learn from.
Introduction: economics imperialism and social science
1. Setting the scene: scientific unification through the use of mathematical models
2. True in the model versus true in the world: mathematical postulation, proof-making activities and economic theory
3. The autonomy of the world within the model: philosophical reflections on hypothetical mathematical modelling in economics
4. Marginalism as proto-imperialist move 1: Jevons and the search for enumerated principles of economic behaviour
5. Economization as proto-imperialist move 2: Robbins and the search for an analytical definition of economics
6. Maximization as proto-imperialist move 3: Samuelson and the search for operationally meaningful mathematical theorems
7. Axiomatization as proto-imperialist move 4: Arrow–Debreu and the search for economically meaningful existence theorems
Conclusion: metamathematical limits to economics imperialism