Bill Graham wants to let the free market work on health care.

But whether the Republican gubernatorial candidate's proposal for a health-insurance exchange works will depend on how the state manages the system, says a Duke University professor.

Chris Conover, director of Duke University's health policy certificate program, said Graham's proposal borrows a central plank from Massachusetts Gov. Mitt Romney's state plan and a federal proposal put forward by U.S. Sen. Richard Burr.

The proposal calls for an exchange in which private companies would offer insurance plans to businesses, the self-employed and interest groups.

After the jump, three questions from Conover about the plan.

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