Alan Trench of Devolution Matters has posted this fascinating piece on the reliability of government fiscal data in Wales and Scotland. Wales has no figures to speak of. Scotland has GERS, which is much better and has improved over the years. But GERS is still an estimate, which justs lists revenue etc from Scotland as a proportion of the UK. It takes no account of the particularities of the Scottish economy. Presumably that would mean our successes in oil, other types of energy, skilled engineering etc are not reflected in the official figures - which still, incidentally,show Scotland in surplus. Alan Trench points out it does not have to be that way. The Swiss Cantons produce highly accurate data which reflect precisely how each region of the small country is performing. Now why can't we do that?