Recently one of our listeners contacted us to say he heard a BBC correspondent describe the iPhone as the most profitable product in history. It was just an off-the-cuff comment but it got us thinking – could it be true? We asked listeners to get in touch with their suggestions. We take a look at a handful of them, from Viagra to popcorn in our quest for an answer. Could it be something more historical?

EU and trade: We take a look at the numbers on trade and at the UK’s relationship with the EU. Tim Harford interviews Chad P. Bown, a Senior Fellow at the Peterson Institute for International Economics.

Leicester City's Premier League success: At the beginning of the football season we explored the fallibility of predictions from experts and fans. As the season is ending, that is the only prediction we made correctly – that they are usually very wrong. Leicester City has had an astonishing success in winning the English Premier League. We take a look at the numbers behind the team’s performance.

Sexist Data Crisis: Are countries around the world failing to collect adequate details about their female citizens? Campaigners have argued we are missing data in areas that would help us understand women’s lives better, for example land and inheritance rights. We also explore how women’s work can be overlooked from labour surveys.