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Alternative Analyses of Measurements of the Planck Constant



Blaza Toman


We compare different methods for the adjustment of the Planck constant using recent, inconsistent data. First we discuss the popular Birge ratio method. By stating the underlying statistical model we critically assess and modify this method. We then propose alternative ways of adjusting the inconsistent data using different, less restrictive assumptions about the cause of the inconsistency. Finally, we discuss the results and give some guidance as to the choice of method.


fundamental constants, Birge ratio adjustment, random effect model, Bayesian model averaging.


Toman, B. (2012), Alternative Analyses of Measurements of the Planck Constant, Metrologia, [online], (Accessed July 25, 2024)


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Created July 5, 2012, Updated February 19, 2017