More or Less: Behind the Stats - How many people support Manchester United?

This week Ruth Alexander looks at Manchester United versus Real Madrid in the last 16 of the Champions League. Real Manager Jose Mourinho says this was the match the "world has been waiting to see". It pitched two of Europe's biggest clubs against each other in what is a supposed to be a money spinner for broadcasters and sponsors alike. But how do we know how big the interest is? Manchester United claim 650 million fans worldwide, but how can we know? Nick Harris of SportingIntelligence.com and Richard Brinkman of KantarMedia help us look at the figures. Also: this round of the Champions League has been a statistical surprise. The rehearsal and the real draw threw up the same fixtures meaning that the same teams were picked to play each other in both draws. Statistician Michael Wallace helps us calculate the chances of this happening.

Start the Week - Mathematical modelling with Lisa Jardine

On Start the Week Lisa Jardine discusses how complex maths has broken free of the laboratory and now influences every aspect of our lives. James Owen Weatherall applauds the take-over of the financial world by physicists, Marcus du Sautoy revels in the numbers and Kenneth Cukier explores how big data will change everything from disease control to bargain buys. But the cultural commentator Tiffany Jenkins sounds a note of caution about a world where everything is measurable.

Producer: Katy Hickman.

More or Less: Behind the Stats - A case of statistical significance in Greece

This week Ruth Alexander looks at the extraordinary case of Andreas Georgiou the head of the Greek statistics agency, Elstat. He is facing criminal charges for what amounts to statistical treason. It is a story that goes to the heart of the Greek debt crisis, that includes extreme office politics, alleged e-mail hacking and a statistician facing at least five years in prison. We speak to Economists Miranda Xafa and Professor Yanis Vourafafkis as well as Syriza MP Dimitris Tsoukalas. Also: do American football players die earlier than their fellow Americans?

Start the Week - Al-Qaeda: Afghanistan to Mali

Bridget Kendall discusses the roots and reach of Islamist terrorism from Afghanistan to Africa. The historian William Dalrymple looks back to Britain's First Afghan War where many Afghanis rose in answer to the call for jihad. Nadeem Aslam's latest novel ranges across the Afghan-Pakistan border where the past and the present are locked together. Dr Christina Hellmich explores what has happened to al-Qaeda since Osama bin Laden's death. And as David Cameron calls the response to Islamist terrorism in North Africa a "generational struggle", the political analyst Imad Mesdoua looks at the parallels with Afghanistan.

Producer: Katy Hickman.

More or Less: Behind the Stats - Fat or Fiction

A ?new? BMI calculation has been proposed by Oxford Mathematician Professor Nick Trefethen but does it really address the problem with a calculation that is over a century old. Body Mass Index was first calculated over 150 years ago and in recent years has become controversial for its imprecise nature. Ruth Alexander and Wesley Stephenson look at how it has developed and what it really tells us, if anything, about our health.

Start the Week - Political Writing: Joan Bakewell and Tim Montgomerie

Start the Week Allan Little explores the legacy of George Orwell's essay Politics and the English Language. Joan Bakewell, Tim Montgomerie, Chris Mullin and Phil Collins discuss Orwell's warning that evasive language, euphemism and insincerity dominate political writing, and assess the impact of today's political diaries, blogging and tweeting.

Producer: Katy Hickman.

More or Less: Behind the Stats - WS MoreOrLess: Indian Farmer Suicides

This week Ruth Alexander is looking at farmer suicides in India. But is it any more prevalent than in any other area of Indian society? Also what is the history behind the Lakh and the Crore in South Asia? It confused one contributor on the farmer suicide story and caused him to get the figures wrong by a factor of 10.

Start the Week - History of Music – John Adams and Howard Goodall

On Start the Week, Tom Sutcliffe talks to Howard Goodall about 40,000 years of music, from prehistoric instruments to modern-day pop, to chart a history of innovation and entertainment. The composer John Adams contrasts European and American traditions as he conducts two concerts at the LSO. The award-winning writer Stephen Poliakoff brings the true story of a black British jazz band in the 1930s to the small screen. And Barb Jungr's cd of cover versions harks back to a tradition of musical re-interpretation. Producer: Katy Hickman.