Study: Unwed, educated couples living together make more money

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A new study by the Pew Research Center found that since the 1990s, the number of American couples living together without being married has doubled. The study also found that these couples are better off financially than their single or married counterparts.

In 2009, the average household income for college-educated couples living together, aged 30 to 44, was $106,400. Married couples earned $101,160 while college-educated adults who lived with roommates, with family members, or alone had an average household income of $90,067.