 Black & White Taxicab & Transfer Co. v. Brown & Yellow Taxicab & Transfer Co.

Black and White Taxicab and Transfer Company v. Brown and Yellow Taxicab and Transfer Company, 276 U.S. 518 (1928), was a United States Supreme Court case in which the Court refused to hold that federal courts sitting in diversity jurisdiction must apply state common law.Ten years later, in "Erie Railroad Co. v. Tompkins", the Court reversed course, and overturned "Swift v. Tyson".