| http://www.w3.org/ns/prov#value | - A family???s effective tax rate typically is significantly lower than its marginal tax rate, because the family takes the standard deduction (or, in some cases, itemized deductions), personal exemptions, and tax credits such as the child tax credit, and because a portion of the family???s taxable income is taxed at lower rates. (For the median-income family, some of its income is not taxed, some i
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