Bayesians Can Learn From Old Data

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Date

2007-11

Authors

Jefferys, W. H.

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Abstract

In a widely-cited paper, Glymour (Theory and Evidence, Princeton, N. J.: Princeton University Press, 1980, pp. 63-93) claims to show that Bayesians cannot team from old data. His argument contains an elementary error. I explain exactly where Glymour went wrong, and how the problem should be handled correctly. When the problem is fixed, it is seen that Bayesians, just like logicians, can indeed learn from old data.

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William H. Jefferys. AIP Conference Proceedings 954, 85 (Nov., 2007); doi: 10.1063/1.2821303