Contributor(s): Professor Mike Savage , Dr Abigail McKnight, Dr Sam Friedman | Welcome to LSE IQ, a monthly podcast from the London School of Economics and Political Science, where we ask leading social scientists - and other experts - to answer an intelligent question about economics, politics or society. In this episode, Joanna Bale investigates why social mobility is declining. She talks to LSE’s Professor Mike Savage, Dr Abigail McKnight and Dr Sam Friedman. For further information about the podcast visit lse.ac.uk/iq and please tell us what you think using the hashtag #LSEIQ.