Attention at all passengers. You can now book your train tickets on Uber and get 10% back in Uber credits to spend on your next train journey.

So no excuses not to visit your in-laws this Christmas.

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, Indonesia transformation,

it thinks that solar can become much more important than wind,

but it also wants to develop hydroelectricity and gas,

which are relatively underdeveloped.

And sand. It may seem abundant, but in fact it's a scarce resource with demand outstripping the rate at which it's

naturally replenished.

Because regulations aren't enforced well enough, not a week goes by without reports of

the goings-on of the San Mathia in India.

But first, a bit of luxury. It seems that almost every week on money talks we touch at some

point on the massive economic impact of China's rise. Perhaps in no business is that more true

than the luxury goods sector.

The emergence of a Chinese middle class with money to spend,

and few inhibitions about flaunting it

led to a boom for expensive fashion, luggage and watches.

But under President Xi Jinping, a crackdown on perceived corruption

has made Chinese consumers more

diffident about showing off their wealth.

How's that affected the luxury business?

Adam Roberts, our European Business and Finance Editor, has been investigating

...