We all behave irrationally. We pay for expensive gym memberships and only go once. We spend windfall cash on things we'd never buy with our salaries. We plan to do nice things in the distant future, but don't actually write them down in our calendars. These things can be bad for our happiness, so why do we do them?

Economist Richard Thaler won a Nobel Prize for studying human irrationality - and explains why we all do odd things sometimes and how we can guard against being so irrational. Richard is joined by fellow behavioral economist Alex Imas to explain the updated insights from the classic book The Winner’s Curse: Behavioral Economics Anomalies Then and Now.