I examine differences between effective tax rates (ETRs) and book-tax differences (BTDs) as alternative measures of corporate tax avoidance or tax aggressiveness. When BTDs are scaled by pretax income, the scaled BTD is statistically equivalent to the ETR. When BTDs are scaled by assets the...

We develop a model to investigate the relations among (1) corporate tax incidence, (2) tax capitalization, and (3) implicit corporate tax in a competitive equilibrium. The economic pretax return is independent of whether the incidence of the corporate tax is shifted from shareholders to...