Examlex
Serotonin is derived from the amino acid tryptophan and is an important neurotransmitter.
Marginal Tax Rate
The percentage of tax applied to the final dollar of income, signifying the tax paid on any extra dollar earned.
Marginal Tax Rate
The rate at which the last dollar of a taxpayer's income is taxed, indicating the proportion of any additional income that will be taken in taxes.
Average Tax Rate
A calculation resulting from dividing an individual's or entity's total tax payments by their total taxable income, indicating the portion of income paid in taxes.
Federal Government
The national government of the United States, which governs at the country level, consisting of the legislative, executive, and judicial branches.
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