At Budget time we are now familiar with tables setting out the impact of announcements – particularly tax and benefit changes – on different household types. The Treasury Green Book  now publishes a familiar bar chart showing the net effect of each Budget on different household deciles in order that we can judge how progressive its measures have been.
But what is less common is any analysis of how big fiscal decisions affect different areas of the country. At the last Budget, the Financial Times created an ‘Austerity Map’  of Britain showing how benefit changes were affecting different local authority areas but it is possible to go further than this and to map how changes across nearly all aspects of government spending affect different regions.
As part of a wider piece of work on government spending , IPPR North has carried out an analysis of yesterday's Spending Round announcements. Assuming that broad spending patterns in 2015/16 are similar to those today, in aggregate, departmental cuts will reduce public expenditure in the North East by £57 per person and in the North West and Yorkshire and Humber by £50 per person, compared with £43 per person in London and £39 per person in the South East.
Perhaps most significantly, though, when we look at the impact of departmental cuts as a proportion of the size of the regional economy (as measured by gross value added) the Northern regions are – once again - hardest hit with the North East suffering three times as much as London.
Consider this alongside announcements concerning capital spending and the picture is compounded further with spending in London more than ten times that of the North East. As a nation we are already spending more than 500 times as much on transport infrastructure in London than we are in the North East, 25 times more than in the North West, but with the announcement of a government commitment to a further £9bn for Crossrail 2, it is likely that the capital city will swallow up more than 90% of all regional transport infrastructure investment in the coming decade.
Government will argue that its commitment to local growth comes in the form of the Single Local Growth Fund – the pot of unringfenced funding which will be bid for by business-led Local Enterprise Partnerships (LEPs). But given that Michael Heseltine proposed a £49bn fund over four years, the announcement is less than one-fifth of what LEPs might have hoped for, only going to prove once again how hard Whitehall finds putting the rhetoric of decentralisation into practice.
If government is serious about rebalanced growth then it must recognise that national prosperity depends upon regional prosperity. Squeezing disproportionate amounts of public spending out of the regions may well have a political and ideological logic to it, but it will leave the country fiscally unbalanced and with regional disparities on the scale of most developing nations. Mercifully, this is only a single year Spending Round, but it is beholden upon any incoming government to reverse this shocking pattern of public expenditure and ensure that northern prosperity is national prosperity once again.
Ed Cox is Director of IPPR North