An Engine, Not a Camera: How Financial Models Shape Markets

Donald MacKenzie

An Engine, Not a Camera: How Financial Models Shape Markets
Format
Paperback
Publisher
MIT Press Ltd
Country
United States
Published
29 August 2008
Pages
392
ISBN
9780262633673

An Engine, Not a Camera: How Financial Models Shape Markets

Donald MacKenzie

In An Engine, Not a Camera, Donald MacKenzie argues that the emergence of modern economic theories of finance affected financial markets in fundamental ways. These new, Nobel Prize-winning theories, based on elegant mathematical models of markets, were not simply external analyses but intrinsic parts of economic processes. Paraphrasing Milton Friedman, MacKenzie says that economic models are an engine of inquiry rather than a camera to reproduce empirical facts. More than that, the emergence of an authoritative theory of financial markets altered those markets fundamentally. For example, in 1970, there was almost no trading in financial derivatives such as futures. By June of 2004, derivatives contracts totaling #273 trillion were outstanding worldwide. MacKenzie suggests that this growth could never have happened without the development of theories that gave derivatives legitimacy and explained their complexities. MacKenzie examines the role played by finance theory in the two most serious crises to hit the world’s financial markets in recent years: the stock market crash of 1987 and the market turmoil that engulfed the hedge fund Long-Term Capital Management in 1998. He also looks at finance theory that is somewhat beyond the mainstream – chaos theorist Benoit Mandelbrot’s model of wild randomness. MacKenzie’s pioneering work in the social studies of finance will interest anyone who wants to understand how America’s financial markets have grown into their current form.

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