'Determination of the relevant product and geographic markets is a necessary predicate to deciding whether a merger contravenes the Clayton Act.' Marine Bancorporation, 418 U.S. at 618 (internal quotation marks omitted). Definition of the relevant market is a factual question 'dependent upon the special characteristics of the industry involved and we will not disturb such findings unless clearly erroneous.' Twin City Sportservice, Inc. v. Charles O. Finley & Co., 676 F.2d 1291, 1299 (9th Cir. 1982).
The relevant geographic market is the 'area of effective competition where buyers can turn for alternate sources of supply.' Morgan, Strand, Wheeler & Biggs v. Radiology, Ltd., 924 F.2d 1484, 1490 (9th Cir. 1991) (alteration omitted) (quoting Oltz v. St. Peter's Cmty. Hosp., 861 F.2d 1440, 1446 (9th Cir. 1988)) (internal quotation marks omitted). Put differently, 'a market is the group of sellers or producers who have the actual or potential ability to deprive each other of significant levels of business.' Rebel Oil Co. v. Atl. Richfield Co., 51 F.3d 1421, 1434 (9th Cir. 1995) (quoting Thurman Indus., Inc. v. Pay 'N Pak Stores, Inc., 875 F.2d 1369, 1374 (9th Cir. 1989)) (internal quotation marks ...