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Studies indicate that income inequality is increasing, with wealthy Americans controlling a greater share of the wealth while incomes for most Americans have changed little compared to the increasing cost of living. This issue of The Reference Shelf takes a close look at the factors impacting income inequality in the United States. Articles featured in this issue examine topics such as the minimum wage, wealth inequality, tax loopholes, corporate taxation, and the ways in which healthcare, childcare, and food expenses prevent Americans from advancing in the economic spectrum.