Their use of survey data, however, was seriously flawed and their results were refuted by University of California at Irvine economist David Neumark and others.

FORBES: Obama's Minimum Wage Hike: A Case Of Zombie Economics

Some of the most careful and convincing empirical research on the employment effects of minimum wages has been done by David Neumark and William Wascher.

FORBES: Resources on the Minimum Wage

In this 2006 Policy Study, David Neumark summarizes the evidence.

FORBES: Should We Care About the Minimum Wage?

Other studies though, particularly those by David Neumark of the University of California at Irvine and William Wascher at the Federal Reserve, consistently found the opposite.

ECONOMIST: The minimum wage

Not surprisingly, their results were overturned by more careful research that found an adverse effect on employment (see David Neumark and William Wascher, American Economic Review, 2000).

FORBES: The Minimum Wage Delusion, And The Death Of Common Sense

David Neumark, an economics professor at the University of California, Irvine, and a senior fellow at the Public Policy Institute of California, has done the best-known empirical studies on job loss resulting from minimum wage hikes.

FORBES: The Minimum Wage: It's All Local