Antitrust. Law specifically exempts 'joint purchasing'.
D016363:Antitrust Laws; D003284:Contract Services / Q000191:economics*; D004865:Equipment and Supplies, Hospital / Q000191:economics*; D017754:Group Purchasing / Q000191:economics / Q000331:legislation & jurisprudence*; D019981:Health Care Sector / Q000331:legislation & jurisprudence; D017721:Hospital Costs / Q000331:legislation & jurisprudence; D006801:Humans; D014481:United States