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In today's Business Matters we assess the economic legacy of Margaret Thatcher, who died in London on Monday. A robust advocate of the free market, she had her admirers and she had her critics. We hear from the economist Will Hutton with a critique of Thatchers economic legacy for the UK but also for the rest of the world. We also talk to former Fed chairman, Paul Volcker - Mrs Thatcher went out of her way to pay him visits at the US central bank back in the 1980s, we find out what kind of impression did she make on him.

We're also live with William Cohan in New York, author of Money and Power: How Goldman Sachs came to rule the world, and we get views from New Zealand on Thatcherism's international legacy.

Plus we have an exclusive report from South Korea after North Korea shut down the joint industrial zone at Kaesong, a complex at which there's otherwise non existent joint economic activity between the two countries.

(Image: Margaret Thatcher. Credit: JOHNNY EGGITT/AFP/Getty Images)