The COVID-19 epidemic has brought to the emergence of fiscal sustainability as an exceptionally challenging issue for both emerging and advanced economies. In this context, it is imperative to assess the sustainability of fiscal deficit in India for the Central and State level for the period 1970–71 to 2021–2022 and 1973–74 to 2021–22, respectively. Furthermore, the study also seeks to establish the cause-and-effect relationship between government expenditure and revenue. The application of Gregory-Hansen cointegration test supports sustainability of fiscal deficits for Central and State governments individually. Additionally, the ARDL model for cointegration indicates that both governments exhibit "weak" sustainability of the fiscal deficit. Finally, the Toda-Yamamoto Granger non-causality test provides evidence in favour of the "spend-tax hypothesis" for both governments. In this backdrop, the present study posits that it is essential for governments to implement fiscal consolidation and prudent fiscal policies in order to reduce the magnitude of the budget deficit, optimise the execution of monetary and exchange rate policies, and foster development driven by the private sector. This approach is crucial to ensure long-term fiscal sustainability and economic stability in India, especially aftermath of the COVID-19 pandemic.
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