POLITICAL economist Professor Richard Murphy is joining the National Extra team to deliver exclusive online-only analysis weekly. Murphy, who is a professor of practice in international political economy and a taxation campaigner, has written extensively about what independence would mean for Scotland’s finances. His work debunking the GERS figures and deficit myths has been widely shared over the years, while his popular Tax Research blog often takes apart Unionist arguments on economics. From next week subscribers will be able to enjoy exclusive work from Murphy every week. He is keen to write on Scotland’s renewables future and what independence means for taxes, among several other topics.