(CBS SF) — A Silicon Valley economic research institute said that income inequality in the Bay Area is now more severe than in the rest of the nation, according to a Silicon Valley economic research institute.

The difference between high- and low-income Bay Area households in 2013 was $263,000, compared with a $178,000 difference nationwide, according to information released Wednesday by the Silicon Valley Institute for Regional Studies.

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Households with incomes among the top five percent of all households in the Bay Area have average incomes of $473,000, according to the institute.

That is 31.5 times the average income of the households at the bottom 20 percent of all Bay Area households.

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That’s a difference of about $458,000.

The difference between the two groups of households nationwide is $328,000, according to the institute.

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