I'm Elizabeth Hotson and in today's Business Daily, we'll be asking whether a simple nudge can change behaviour for the common good, even in potentially life and death situations.

People reduce their consumption of water in response to these nudges.

This was sustained over the entire two-year period even after we'd

stopped sending people the nudgeers. But what is the right thing? And can selfish people

turning to altruists? A major part of why people are good is this reputation piece that they

want to be seen as good people in

their society, they don't want to be seen as mooches, and so we try to tap into that.

This is Business Daily from the BBC.

Over the last two weeks

I've eaten in restaurants and cafes

far more than I usually would have done

15 times to be precise

One of these was a Korean dessert emporium

which specialises in a flavoured

shaved ice confection called Bing Su.

Since it's half price, I'm going to go for the regular Oreo.

It's £4.50 instead of £9. I can't really refuse that kind of offer, can I?

The UK government is offering consumers 50% off the price of food and soft drinks

for eating orders on Mondays to Wednesdays during August.

The scheme is taxpayer-funded and consumers can get up to £10 or around $13 off their bills.

I'm on promotion number 14 and I'm in a posh kebab place.

I'm going to order a main kebab, some pork, bainier and a side of broccoli.

...