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Head to octopusevo.com to get started today. Hello, I'm Philip Kogan, the economist Buttonwood Columnist, and this is Money Talks.

Later in the programme, Artificial Intelligence and why, thanks to its deep pool of data, China is said to lead the world.

You mind that data, you feed that for algorithms, you develop a service, which then allows you to collect more data,

improve that service, feed that back.

So it's basically a feedback loop.

And the Big Mac Index and Purchasing Power Parity,

how much burger does your money get you around the world?

But very few currencies are overvalued against the dollar

according the Big Mac Index.

It's usually the Swiss franc and then usually the Nordic currencies.

But to start, America's annual GDP in a possible link to climate change.

There's a new paper just out which looks at how climate change is likely to affect locations

within the US and how those climatic shifts will affect local economies.

I'm joined from Washington DC by the Economist senior editor and Free Exchange columnist Ryan Avent.

Ryan, what does the new report say? Well the new report looks at a few

different things and I think its main overarching goal is to try to map particular changes in global temperature

onto the damages that the US economy would face.

...