how to calculate tax rate for overall economy if the tax rates for different heads are not available ?? i have found 2 measures in literarures (1) tax revenue to gdp ratio as avarage tax rate (see Taner Turan et al. 2014, Jayawickrama and Abeysinghe 2013) (2) Empirical works of Rudi Kurniawan (2011), Mesut KARAKAS (2014) etc estimated overall tax rate as central govt tax revenue divided by GDP. Which tax rate is representative one for whole economy? And Why ?? What is the logic to said it as tax rate in Public finance ??