undue percentage share test
Defined in 1 dictionary — Case Law
Definitions from Case Law
From 399 U.S. 350 - United States v. Phillipsburg National Bank & Trust Co. · 1970Most cited · 248 citing opinions
a merger which produces a firm controlling an undue percentage share of the relevant market, and results in a significant increase in the concentration of firms in that market is so inherently likely to lessen competition substantially that it must be enjoined in the absence of evidence clearly showing that the merger is not likely to have such anticompetitive effects