The report, Generating Economic Benefit and Growth Through Smarter Public Sector Procurement, written by UK-based procurement expert Colin Cram, has been supported by Rosslyn Analytics.

FORBES: Dumb Practices: Why American Tax Dollars Are Wasted And Where To Find The Solution

Projects would need to have a clear public benefit, meet rigorous economic, technical, and environmental standards, and be backed by a dedicated revenue stream.

WHITEHOUSE: The White House

Gary Gates, a demographer at the Williams Institute at the UCLA School of Law who researches sexual orientation law and public policy, says the state itself would see a "noticeable economic benefit" from legalized same-sex marriage.

CNN: Economy enters same-sex marriage debate