More or Less

Today’s More or Less tries to sketch out the Laffer Curve with help from the IFS and Harvard Business Review’s Justin Fox. Alex Bellos reports from the mental calculation world cup. The all-powerful More or Less 5000 makes an unwelcome appearance, too.

And we answer the Tuesday Boy problem: “I have two children, one of whom is a boy born on a Tuesday. What is the probability that I have two sons.” Not as easy as it looks – and it doesn’t look that easy…

As always, the website is, the podcast will be available soon, and the program will be broadcast today at 1.30pm (BST) on Radio 4, repeated on Sunday at 8pm.

Tim Harford’s blog

This blog is no longer updated but it remains open as an archive.

Tim, also known as the Undercover Economist, writes about the economics of everyday life.