1 citations · 3 across the 7 of their papers we have counts for
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math.ST2017★ 1 cited
Covariance structure associated with an equality between two general ridge estimators
Koji Tsukuda, Hiroshi Kurata
In a general linear model, this paper derives a necessary and sufficient condition under which two general ridge estimators coincide with each other. The condition is given as a st…
math.PR2017★ 1 cited
On Poisson approximations for the Ewens sampling formula when the mutation parameter grows with the sample size
Koji Tsukuda
The Ewens sampling formula was firstly introduced in the context of population genetics by Warren John Ewens in 1972, and has appeared in a lot of other scientific fields. There ar…