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As a personnel policy that would assure the country's rapidly expanding railroad system the best grade of employees, centralization of discharge data within a company and interchange of such data between companies struck some executives as a useful practice. Others disagreed and, as Professor Black shows, their wisdom prevailed. The problem centered upon reliability of such key operating employees as brakemen and conductors, and responded better to institution of controls that would minimize the two most important misfeasances: drinking on the job and petty embezzlement.