thecommongreen, 
My article in this week's Common Weal Newsletter.
The "economic case" for the 'Green Freeports' is that if we cut corporate taxes, they create jobs and income taxes offset the tax cut.
However, ScotGov hasn't done the modelling to see if this would be the case.
https://commonweal.scot/a-deal-with-the-devolved-part-three/
