Examlex
Natural selection is regarded as a theory because:
Average Tax Rate
The average tax rate is the proportion of total taxable income paid in taxes, calculated by dividing the total tax paid by the total income.
Marginal Tax Rate
The rate at which the last dollar of income is taxed.
Lump-Sum Tax Rate
A tax that is a fixed amount, no matter the change in circumstance of the taxed entity. This creates a situation where the tax burden falls more heavily on those with lower income or profit.
Marginal Tax Rate
The amount of tax applied to an additional dollar of income, often used in progressive tax systems.
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