Heather Oberdorf v. Amazon.com Inc

This case implicates an important yet relatively uncharted area of law. No Pennsylvania court has yet examined the product liability of an online marketplace like Amazon's for sales made by third parties through its platform. Our task, as a federal court applying state law, is to predict how the Pennsylvania Supreme Court would decide the case. Berrier v. Simplicity Mfg., Inc. , 563 F.3d 38 , 45 (3d Cir. 2009). We must take special care "to apply state law and not ... to participate in an effort to change it." McKenna v. Ortho Pharm. Corp. , 622 F.2d 657 , 663 (3d Cir. 1980) (internal…