Tag Archives: juckes

Overfitting by Inverse Regression

Wahl and Ammann 2006 reported that they could “get” something that was sort of HS-ish without principal component analysis. It wasn’t through a simple mean or CVM; it was through Mannian inverse regression. Juckes et al shows many reconstructions using “inverse regression”, mentioning in his conclusions that inverse regression caused over-concentration on a few proxies. […]

Willis on “Getting authors to respond to questions”

[JohnA: For reasons that I don't understand, posting comments became nearly impossible for some people for a short while. This comment from Willis I thought should be captured for future reference so I made it into a post.] Willis Eschenbach writes: Well, on the 4th of this month I posted a couple of questions on […]

The Euro Hockey Team and Yamal

Readers of this blog are familiar with the Yamal subsitution. Briefly, Briffa et al 1995 reported in Nature that 1032 was the coldest year of the millennium based on no more than 3 poorly dated and short cores in the 11th century. Subsequently new cores were dated to the 11th century by Schweingruber, resulting in […]


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