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    Debt and Deficit: Fiscal Analysis with Stationary Ratios
    (2023-05-03)
    John Campbell
    ;
    ;
    Ian Martin
    We study cointegrating relationships among fiscal variables and output and use them to introduce a new measure of the government's fiscal position. In the US since World War II, we find that the primary surplus-GDP ratio and the government debt-GDP ratio are nonstationary, which invalidates standard analytical approaches that assume them to be stationary. The tax revenue-debt ratio and the government expenditure-debt ratio are also nonstationary but their difference, the primary surplus-debt ratio, is stationary, as is the tax revenue-GDP ratio. We develop a new framework for fiscal analysis that takes account of these facts. Empirically, we find that a deterioration in the fiscal position forecasts a decline in government spending over the long run. It does not forecast increases in tax revenue; nor does it forecast low returns for bondholders. Fiscal adjustment to tax and expenditure shocks occurs primarily through mean-reversion in tax and expenditure growth, with a negligible contribution from expected and unexpected debt returns. We find similar results for postwar UK data.
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    Item type:Publication,
    Debt and Deficit: Fiscal Analysis with Stationary Ratios
    (2023-05)
    John Campbell
    ;
    ;
    Ian W.R. Martin
    We study cointegrating relationships among fiscal variables and output and use them to introduce a new measure of the government's fiscal position. In the US since World War II, we find that the primary surplus-GDP ratio and the government debt-GDP ratio are nonstationary, which invalidates standard analytical approaches that assume them to be stationary. The tax revenue-debt ratio and the government expenditure-debt ratio are also nonstationary but their difference, the primary surplus-debt ratio, is stationary, as is the tax revenue-GDP ratio. We develop a new framework for fiscal analysis that takes account of these facts. Empirically, we find that a deterioration in the fiscal position forecasts a decline in government spending over the long run. It does not forecast increases in tax revenue; nor does it forecast low returns for bondholders. Fiscal adjustment to tax and expenditure shocks occurs primarily through mean-reversion in tax and expenditure growth, with a negligible contribution from expected and unexpected debt returns. We find similar results for postwar UK data.
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