Purpose The purpose of this paper is to find out the factors contributing to major shifts in the growth of tax revenue through the estimation of structural breaks and analysis of major tax regimes. Recent contributions to optimal tax theory and empirical literature on the Laffer curve effect, based on elasticity of taxable income, challenge the settled understanding on the rate-revenue relationship. In this backdrop, the objective of the paper is to find out the relative significance of changes in tax rate, tax base and administrative reforms in affecting the growth of tax revenue in India. The paper considers tax data spanning a period of six and half decades for five major components of direct and indirect taxes (corporation, personal income, customs, excise and service) of the central government of India. Design/methodology/approach Unknown break point(s) – single and multiple – in the tax structure are identified by using the Quandt-Andrews and Bai-Perron econometric tests. These tests were conducted for two models of growth of taxes (tax revenue and tax-NDP ratio) estimated using semi-log functions. A simulation exercise was conducted to find out the robustness of the results by varying the trimming parameter and number of breaks. An analytical framework is used to understand the factors associated with these breaks. Findings There is more than one break identified for every tax component as per the results of Bai–Perron test. The simulation exercise suggests that estimated breakpoints are mostly robust. Economic growth, structural changes in the economy, simplification and rationalization of tax structure, tax competition, policies such as liberalization have contributed to the changing tax regimes. Results of this study suggest that high tax rates have not been, in particular, detrimental to achieving growth in revenue and factors other than changes in tax rates have been more prominent in bringing about the shifts. Originality/value This is, perhaps, the first paper exploring the multiple structural breaks in the fiscal variables in India. It offers an understanding of the changing regimes of central government taxes and the underlying factors for the same.

The objective of the article is to examine the fiscal sustainability of the Indian central government’s finances in the era of rule-based fiscal policy. Asymmetric budgetary adjustment process and revenue–expenditure nexus are also analysed in this article by employing threshold autoregressive models/momentum threshold autoregressive models. Findings of the article reveal emerging issues in fiscal sustainability in India. The central government’s expenditure as a share of gross domestic product (GDP) has been falling continuously, leaving little room for further pruning. The current scenario of negative growth in central government’s revenue as a share of GDP, if not reversed, can become the Achilles heel of government finances in India. JEL Classification: E62, H600, H500, C32

The dynamics of urban poverty and vulnerability may play out differently in the Global South, which has been witnessing large scale urbanization not strictly driven by economic forces.

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