By Andy Verity
BBC economics correspondent
A radical of economists has questioned UK assertions that a "black hole" successful the nationalist finances volition request to beryllium filled with austerity measures and taxation rises.
The Progressive Economy Forum said the £50bn "hole" disappears wholly if the debts are calculated differently.
The authorities antecedently utilized a antithetic measurement of debt, and going backmost to utilizing that would permission £14bn to spare, they said.
The Treasury said the nationalist finances would beryllium assessed independently.
Media treatment of the government's taxation and spending options up of the Autumn Statement has been dominated by a alleged "black hole" successful the nationalist finances, enactment astatine thing from £35bn to £60bn, which, it is assumed, indispensable urgently beryllium "filled" with spending cuts oregon taxation rises.
But the economists said that "fiscal hole" is simply the quality betwixt an uncertain forecast - of however overmuch the authorities volition walk and get successful aboriginal nether existent plans - and what it tin spend to bash if it is to deed an arbitrary people - that indebtedness starts to autumn arsenic a proportionality of the system 3 oregon 5 years from now.
If the system grows faster oregon the clip framework changes, the "hole" tin shrink oregon turn dramatically - acold much than it would due to the fact that of spending cuts oregon taxation rises.
Using authoritative forecasts from the Office for Budget Responsibility, the authors of the research, economists Jo Michell and Rob Calvert Jump, reason that tiny changes successful forecasts for aboriginal involvement rates and growth, and what is counted arsenic authorities debt, dramatically change the size of the evident "hole".
These changes to forecasts and accountancy rules nutrient acold bigger effects connected the £50bn "hole" than immoderate changes successful spending and taxes the authorities is reported to beryllium considering for the Autumn Statement.
Reversing a determination to exclude the Bank of England's indebtedness from the government's ain indebtedness figure, made successful January 2022, "completely wipes retired the projected 'fiscal hole' and, connected the authoritative forecasts, leaves the authorities with an further £14bn to walk against its ain indebtedness targets by 2027", they said.
As chancellor, Rishi Sunak antecedently utilized a antithetic accountancy regularisation successful 2020 and 2021 to get astatine his chosen fig for authorities debt.
Changing the accountancy regularisation utilized to measurement the authorities indebtedness backmost to what it was earlier the Autumn Statement successful 2021 wholly removes the "black hole", according to the economists' analysis, putting authorities indebtedness backmost connected a sustainable footing.
Conversely, the study says, a tiny summation successful the government's forecast borrowing costs makes the "hole" overmuch larger and the way of aboriginal indebtedness unsustainable, rendering the fiscal people "useless".
"There is present a statement among economists that austerity does important harm to an economy's potential, undermining growth, arsenic the acquisition of the past decennary successful Britain has shown us," Mr Calvert Jump said.
"Further austerity volition bash acold much harm than a 'fiscal hole' that disappears with tweaks to models oregon accounting rules."
Dr Michell said: "These results amusement that the authorities is basing its economical argumentation connected precise shaky foundations. The lawsuit for austerity spending cuts is that the 'fiscal hole' indispensable beryllium closed.
"But if the 'hole' disappears with tiny changes successful forecasts oregon accounting rules, it is not a reliable ground for economical argumentation changes, particularly of the size the authorities is reportedly considering."
A Treasury spokesperson said that the Office for Budget Responsibility would behaviour an autarkic appraisal of the nationalist finances.