<Tr> <Th> Underclass (12%) </Th> <Td> Those with limited or no participation in the labor force . Reliant on government transfers . Some high school education . </Td> <Th> The poor (ca . 12%) </Th> <Td> Those living below the poverty line with limited to no participation in the labor force; a household income of $18,000 may be typical . Some high school education . </Td> </Tr> <Tr> <Td_colspan="6"> <Dl> <Dd> References: Gilbert, D. (2002) The American Class Structure: In An Age of Growing Inequality . Belmont, CA: Wadsworth, ISBN 0534541100 . (see also Gilbert Model); </Dd> <Dd> Thompson, W. & Hickey, J. (2005). Society in Focus . Boston, MA: Pearson, Allyn & Bacon; Beeghley, L. (2004). The Structure of Social Stratification in the United States . Boston, MA: Pearson, Allyn & Bacon . </Dd> <Dd> The upper middle class may also be referred to as "Professional class" Ehrenreich, B. (1989). The Inner Life of the Middle Class . NY, NY: Harper - Collins . </Dd> </Dl> </Td> </Tr> <Dl> <Dd> References: Gilbert, D. (2002) The American Class Structure: In An Age of Growing Inequality . Belmont, CA: Wadsworth, ISBN 0534541100 . (see also Gilbert Model); </Dd> <Dd> Thompson, W. & Hickey, J. (2005). Society in Focus . Boston, MA: Pearson, Allyn & Bacon; Beeghley, L. (2004). The Structure of Social Stratification in the United States . Boston, MA: Pearson, Allyn & Bacon . </Dd> <Dd> The upper middle class may also be referred to as "Professional class" Ehrenreich, B. (1989). The Inner Life of the Middle Class . NY, NY: Harper - Collins . </Dd> </Dl> <Dd> References: Gilbert, D. (2002) The American Class Structure: In An Age of Growing Inequality . Belmont, CA: Wadsworth, ISBN 0534541100 . (see also Gilbert Model); </Dd>

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