HARDtalk speaks to one of modern Russia's best and brightest economists, Sergei Guriev. Well connected to the new Russian political elite, Guriev was a strong voice for economic liberalisation and a Russian patriot. So why, earlier this year, did he choose, as so many talented Russians have in the past, to go into exile? And what does Guriev's extraordinary story tell us about the true face of Vladimir Putin's Russia?