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In More Or Less, Tim Harford interviews Nobel Prize winning economist Professor Angus Deaton about his views on foreign aid and how far he thinks our wealth affects our happiness.

Â鶹Éç Trending describes how scientists are swapping academic papers in secret - most of the time illegally – using a Twitter hashtag ‘#ICanHazPDF’. We ask the scientist who came up with the idea why thousands of people are using it, and how they justify their actions.
And, this week Salman Rushdie dubbed the internet trolls who back the Indian Prime Minister ‘Modi Toadies’. But who are they and are they a sign of growing intolerance in India?

And in the Why Factor, Mike Williams asks why hundreds of millions of people support sports team, even if they are playing on the other side of the world.

(Photo: Angus Deaton listens to a question after winning the Nobel Prize for Economics. Credit: Getty Images)