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Asymptotic efficiency of a sequential multihypothesis test

A sequential multihypothesis test known as the M-ary sequential probability ratio test (MSPRT) is generalized to account for nonuniform decision costs. Bounds on error probabilities and asymptotic expressions for the stopping time and error probabilities are given. A key result of this correspondence is a proof that the generalized MSPRT is asymptotically efficient.