Allowing gay and lesbian couples to marry in Oregon would generate $47.3 million over 3 years and generate 468 new jobs in the state, a study released Tuesday concludes.

According to the Williams Institute, an independent think tank at UCLA Law, extending marriage to gay couples would boost Oregon's economy.

Researchers looked at 2010 U.S. Census data to estimate that 5,887 couples – 50 percent of the state's 11,773 same-sex couples – would marry in the first three years of legalization and that couples would on average spend $6,399 per wedding.

Spending and tourism related to the weddings would also generate approximately 468 new jobs in Oregon over the first three years.

The group's estimates do not include revenue generated from the weddings of gay couples from other states who travel to Oregon to marry, though two of Oregon's neighbors – California and Washington – allow such unions.

A federal judge will hear oral arguments next week in a case challenging Oregon's marriage ban.

(Related: Oregon backers ask court to spare voters costly gay marriage fight.)