In the summer of 2001, a few members of the non-unionized workforce asked management for information about the wage per hour earned by the average worker.

FORBES: Will You Be More Productive If You Know How Your Pay Compares With Your Colleagues'?

The law mandated a minimum 25-cent-per-hour wage, in addition to setting the maximum amount of hours most employees could work per week at 44.

FORBES: Minimum Wage: Good Cause Or Economic Pariah?

The Department of Labor concluded that the first minimum wage, 25 cents per hour in 1938, cost the jobs of 30, 000 to 50, 000 of the 300, 000 workers who were covered and had previously earned below the minimum.

FORBES: The Minimum Wage Typifies Much That Is Wrong With Washington

If you care about output per hour, make sure to divide by the hourly wage.

FORBES: The Truth About Productivity