The exercise of monopsony in labor markets is limited to one degree or another by public policy. Employer conduct aimed at creating monopsony power is governed by the Sherman Act of 1890, which forbids collusion among employers as well as competitively unreasonable conduct by a single employer.

This chapter discusses private suits and the prohibition of §1 and the sanctions for violations. Corporations are subject to fines while individuals may be fined and/or imprisoned. Section 1 forbids collusive restraints of trade. In the past, there was some confusion regarding the applicability of §1 to labor markets. These days are gone. The Department of Justice and Federal Trade Commission have issued their Antitrust Guidance for Human Resource Professionals in which the agencies make it crystal clear that they will pursue criminal convictions for collusion in labor markets. In addition to public sanctions, §4 of the Clayton Act provides a private right of action for antitrust victims.