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How Amazon Dash button could hurt brands

Amazon's Dash button could hurt new brands if it becomes widely used to re-order old favorites, according to one economist.

In this Oct. 18, 2010 file photo, United Parcel Service (UPS) driver delivers an Amazon box. (Photo by Paul Sakuma/AP)
In this Oct. 18, 2010 file photo, United Parcel Service (UPS) driver delivers an Amazon box.AP

Althea Chang