May I have your attention please you can now book your train tickets on Uber and get

10% back in credits to spend on your next Uber ride so you don't have to walk home in the rain again.

Trains now on Uber. T's and C's apply. Check the Uber app. Hello I'm Simon Long, finance and economics editor at The Economist, and this is Money Talks.

Later in the programme, the ever widening gap between US and European bond yields can then be explained

by fiscal and monetary policy differences.

A bigger deficit means more bonds to issue, more bonds to issue means more bonds to buy and thus investors demand a higher

yield for buying those bonds. And Tyres. In 2000 the established brands accounted for

over two-thirds of the market.

Now their share has been deflated to under half.

What is clear is that these Chinese tyre companies have taken a big bite out of the market

share of the established global brands.

But to start, Amazon is a most unusual company.

Once a bookseller, it's now the world's leading provider of cloud computing.

It peddles goods from Manchester to Mumbai.

In America, it accounts for more than half of every new dollar spent online.

And as of last month, it's now an Academy Award-winning film producer.

All of this has made Amazon the fifth most valuable company in the world.

I'm joined on the line from New York by the economist's consumer and retail

correspondent Charlotte Howard who's written at length about Amazon for

this week's economist. First Charlotte is it possible to characterize what

sort of firm it is? Is it a

a vertically integrated online retailer or is it a new sort of digital

...