The ‘Ndrangheta are one of Italy’s biggest and most dangerous criminal gangs. One piece of research suggested they have an annual turnover of €53bn - more than McDonalds and Deutsche Bank combined.
But is that number realistic? Professor Anna Sergi and Professor Francesco Calderoni help us figure out what kind of number makes sense.
Reporter: Perisha Kudhail
Series producer: Tom Colls
Sound mix: Neil Churchill
Editor: Richard Vadon
(Picture: Human hands with strings controlling diagram.
Credit: Boris Zhitkov/Getty Images)