Companies vowed to hire more workers without college degrees. But a study says they're not following through.

• A new study found companies aren't keeping their promises to hire more non-college grads.
• Some of the companies removed degree requirements from job listings, the study said.
• Others made progress, but then reverted to their old patterns.

Bank of America, Amazon, and Lockheed Martin are among the large companies that promised they'd drop college degree requirements in their job listings.

But their hiring practices are still the same, according to a new study from Harvard Business School and the Burning Glass Institute: they're still hiring college grads.