A. Sharma’s scientific contributions

The responsiveness of tax revenues vis-a-vis changes in national income (or the tax base) may not always be consistent. Specifically, in developing economies where the tax base is already skewed and narrow, tax revenues may perhaps not turn out to be responsive to changes in economic growth. Hence, the present study is an attempt to estimate income tax revenue responsiveness in India posts the structural reforms of 1991. The trends in income tax revenue have been examined using the tax to GDP ratio measure and estimating income tax revenue's buoyancy for the period 1991-2015 using the Divisia index approach.The tax buoyancy coefficient for the study period has been found to be 1.879. The tax elasticity coefficient for the study period (1991-2015) has been 0.53, thus depicting the low magnitude of automatic responsiveness for income tax collections vis-à-vis variations in economic growth post the reforms era. The regression results depict that the present model explains 20.8 per cent variance in the dependent variable, income tax revenue.