Median income can be calculated in terms of household income, by personal income, or for specific demographic groups.
The measurement of income from individuals and households, which is necessary to produce statistics such as the median, can pose challenges and yield results inconsistent with aggregate national accounts data.
For example, an academic study on the Census income data claims that when correcting for underreporting, U.S. median gross household income was 15% higher in 2010 (table 3).
[1] When taxes and mandatory contributions are subtracted from income, the result is called net or disposable income.
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