Did Hyman Minsky find the secret behind financial crashes?

Hyman Minsky Image copyright Levy Economics Institute of Bard College



His long out-of-print books were suddenly in high demand with copies changing hands for hundreds of dollars - not bad for densely written tomes with titles like Stabilizing an Unstable Economy.

Senior central bankers including current US Federal Reserve chair Janet Yellen and the Bank of England's Mervyn King began quoting his insights. Nobel Prize-winning economist Paul Krugman named a high profile talk about the financial crisis The Night They Re-read Minsky.

Here are five of his ideas.

Stability is destabilising

Minsky's main idea is so simple that it could fit on a T-shirt, with just three words: "Stability is destabilising."

Most macroeconomists work with what they call "equilibrium models" - the idea is that a modern market economy is fundamentally stable. That is not to say nothing ever changes but it grows in a steady way.

To generate an economic crisis or a sudden boom some sort of external shock has to occur - whether that be a rise in oil prices, a war or the invention of the internet.



Three stages of debt

Minsky had a theory, the "financial instability hypothesis", arguing that lending goes through three distinct stages. He dubbed these the Hedge, the Speculative and the Ponzi stages, after financial fraudster Charles Ponzi.




Minsky moments


Image copyright Rex Features
Image caption The Minsky moment: Like the moment when the cartoon character realises they're running on thin air

It is like the moment that a cartoon character runs off a cliff. They keep on running for a while, still believing they're on solid ground. But then there's a moment of sudden realisation - the Minsky moment - when they look down and see nothing but thin air. Then they plummet to the ground, and that's the crisis and crash of 2008.

Finance matters


This is rather like the way most people are not very interested in the finer details of plumbing when they're having a shower. As long as the pipes are working and the water is flowing there is no need to understand the detailed workings.

Image copyright AP
Image caption The 2008 crash brought wider attention to the workings of the financial system

To Minsky, banks were not just pipes but more like a pump - not just simple intermediaries moving money through the system but profit-making institutions, with an incentive to increase lending. This is part of the mechanism that makes economies unstable.

Preferring words to maths and models



Although he trained in mathematics, Minsky preferred what economists call a narrative approach - he was about ideas expressed in words. Many of the greats from Adam Smith to John Maynard Keynes to Friedrich Hayek worked like this.

While maths is more precise, words might allow you to express and engage with complex ideas that are tricky to model - things like uncertainty, irrationality, and exuberance. Minsky's fans say this contributed to a view of the economy that was far more "realistic" than that of mainstream economics.

Analysis: Why Minsky Matters is broadcast on BBC Radio 4 at 20:30 GMT, 24 March 2014 or catch up on BBC iPlayer

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