It is unfortunate that the political rhetoric aimed at pitting folks in different income groups against each other is not supported by the facts.

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Interestingly, different income groups are helped by very different preferences.

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To back these claims up, the authors constructed price indices for 12 income groups, using official figures and detailed private information on the spending habits of different households.

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Although the researchers controlled for marital status, education, income, and age, other unidentified factors may have skewed the survey data on different genders and ethnic groups, Bahr says.

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