Is antitrust law an inappropriate vehicle for protecting small business?Scholar

Is antitrust law an inappropriate vehicle for protecting small business?Scholar and jurist Richard Posner arguesThe protection of small business whatever its intrinsic merit cannot be attained within the framework of antitrust principles and procedures. The small businessman is in general helped rather than hurt by monopoly so unless the antitrust laws are stood completely on their head they are an inapt vehicle (compared say to tax preferences) for assisting small business.Is antitrust law an inappropriate vehicle for protecting small business? Please explain.Should we protect small business?