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median household income
Median income is the amount that divides the income distribution into two equal groups, half having income above that amount, and half having income below that amount. Mean income (average) is the amount obtained by dividing the total aggregate income of a group by the number of units in that group.
Household income is not to be confused with family or personal income.
==Gallup gross median household income==
In 2013, Gallup published a list of countries with median household income, based on a self-reported survey of approximately 1000 adults from each country.〔http://www.gallup.com/poll/166211/worldwide-median-household-income-000.aspx〕 Using median, rather than mean income, results in a much more accurate picture of the average income of the middle class since the data will not be skewed by gains and abnormalities in the extreme ends. The figures are in international dollars using purchasing power parity and are based on responses from at least 2,000 adults in each country, with the data aggregated from 2006 to 2012. Below is a list of the top 30 countries. The figures are before deduction of taxes and social contributions and not adjusted for household size.
*Based on analysis on US median household income, median household money income during the 2006-2012 period averaged $53,836, therefore by comparison the Gallup result is underreported and is even below the Census' own figures. 〔http://www.census.gov/content/dam/Census/library/publications/2014/demo/p60-249.pdf〕A study on the Census income data showed that when correcting for underreporting, US gross median household income was $58,997 between 2006 and 2010 (table 3). 〔http://bea.gov/about/pdf/Fixler_Johnson.pdf〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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