Articles by Keith Goldfeld

Is non-inferiority on par with superiority?

May 13, 2018 | Keith Goldfeld

It is grant season around here (actually, it is pretty much always grant season), which means another series of problems to tackle. Even with the most straightforward study designs, there is almost always some interesting twist, or an approach that presents a subtle issue or two. In this case, the ...
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How efficient are multifactorial experiments?

May 1, 2018 | Keith Goldfeld

I recently described why we might want to conduct a multi-factorial experiment, and I alluded to the fact that this approach can be quite efficient. It is efficient in the sense that it is possible to test simultaneously the impact of multiple interventions using an overall sample size that would ...
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Who knew likelihood functions could be so pretty?

October 22, 2017 | Keith Goldfeld

I just released a new iteration of simstudy (version 0.1.6), which fixes a bug or two and adds several spline related routines (available on CRAN). The previous post focused on using spline curves to generate data, so I won’t repeat myself here. And, apropos of nothing really - I thought ...
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