First broadcast: on BBC NewsLatest broadcast: on BBC News Channel HD
Shaun Ley speaks to behavioural economist Richard Thaler about 'nudge' theory. If you live in Britain, you may unwittingly already be part of a nudge experiment. Show more
First broadcast: on BBC News EuropeLatest broadcast: on BBC News North America
Following the announcement that Richard Thaler has won the Nobel Prize for Economics, HARDtalk takes another look at his 2012 interview with Shaun Ley. Show more