Xu, Haifeng; Ohtani, Kazuhiro PMSE performance of two different types of preliminary test estimators under a multivariate \(t\) error term. (English) Zbl 1508.62170 Commun. Stat., Theory Methods 48, No. 17, 4320-4338 (2019). MSC: 62J05 62H12 62J07 PDFBibTeX XMLCite \textit{H. Xu} and \textit{K. Ohtani}, Commun. Stat., Theory Methods 48, No. 17, 4320--4338 (2019; Zbl 1508.62170) Full Text: DOI
Namba, Akio; Ohtani, Kazuhiro MSE performance of the weighted average estimators consisting of shrinkage estimators. (English) Zbl 1462.62447 Commun. Stat., Theory Methods 47, No. 5, 1204-1214 (2018). MSC: 62J07 62J05 PDFBibTeX XMLCite \textit{A. Namba} and \textit{K. Ohtani}, Commun. Stat., Theory Methods 47, No. 5, 1204--1214 (2018; Zbl 1462.62447) Full Text: DOI
Namba, Akio; Ohtani, Kazuhiro MSE performance of a heterogeneous pre-test ridge regression estimator. (English) Zbl 1319.62147 Commun. Stat., Theory Methods 41, No. 7-9, 1692-1700 (2012). MSC: 62J07 62J05 PDFBibTeX XMLCite \textit{A. Namba} and \textit{K. Ohtani}, Commun. Stat., Theory Methods 41, No. 7--9, 1692--1700 (2012; Zbl 1319.62147) Full Text: DOI
Namba, Akio; Ohtani, Kazuhiro Risk performance of a pre-test ridge regression estimator under the LINEX loss function when each individual regression coefficient is estimated. (English) Zbl 1187.62127 J. Stat. Comput. Simulation 80, No. 3, 255-262 (2010). MSC: 62J07 65C60 62J05 PDFBibTeX XMLCite \textit{A. Namba} and \textit{K. Ohtani}, J. Stat. Comput. Simulation 80, No. 3, 255--262 (2010; Zbl 1187.62127) Full Text: DOI
Namba, Akio; Ohtani, Kazuhiro Risk comparison of the Stein-rule estimator in a linear regression model with omitted relevant regressors and multivariatet errors under the Pitman nearness criterion. (English) Zbl 1134.62346 Stat. Pap. 48(2007), No. 1, 151-162 (2006). MSC: 62J05 62H12 62J07 PDFBibTeX XMLCite \textit{A. Namba} and \textit{K. Ohtani}, Stat. Pap. 48, No. 1, 151--162 (2006; Zbl 1134.62346) Full Text: DOI
Namba, Akio; Ohtani, Kazuhiro PMSE performance of the Stein-rule and positive-part Stein-rule estimators in a regression model with or without proxy variables. (English) Zbl 1089.62085 Stat. Probab. Lett. 76, No. 9, 898-906 (2006). MSC: 62J05 62H12 62J07 PDFBibTeX XMLCite \textit{A. Namba} and \textit{K. Ohtani}, Stat. Probab. Lett. 76, No. 9, 898--906 (2006; Zbl 1089.62085) Full Text: DOI
Ohtani, Kazuhiro Pre-test double \(k\)-class estimators in linear regression. (English) Zbl 0951.62054 J. Stat. Plann. Inference 87, No. 2, 287-299 (2000). MSC: 62J05 62J07 62C15 PDFBibTeX XMLCite \textit{K. Ohtani}, J. Stat. Plann. Inference 87, No. 2, 287--299 (2000; Zbl 0951.62054) Full Text: DOI
Ohtani, Kazuhiro An MSE comparison of the restricted Stein-rule and minimum mean squared error estimators in regression. (English) Zbl 0935.62080 Test 7, No. 2, 361-376 (1998). MSC: 62J07 62J05 PDFBibTeX XMLCite \textit{K. Ohtani}, Test 7, No. 2, 361--376 (1998; Zbl 0935.62080) Full Text: DOI
Ohtani, Kazuhiro MES performance of the minimum mean squared error estimators in a linear regression model when relevant regressors are omitted. (English) Zbl 0940.62062 J. Stat. Comput. Simulation 61, No. 1-2, 61-75 (1998). MSC: 62J05 65C60 PDFBibTeX XMLCite \textit{K. Ohtani}, J. Stat. Comput. Simulation 61, No. 1--2, 61--75 (1998; Zbl 0940.62062) Full Text: DOI
Ohtani, Kazuhiro Minimum mean squared error estimation of each individual coefficient in a linear regression model. (English) Zbl 0886.62067 J. Stat. Plann. Inference 62, No. 2, 301-316 (1997). MSC: 62J05 62P20 65C05 PDFBibTeX XMLCite \textit{K. Ohtani}, J. Stat. Plann. Inference 62, No. 2, 301--316 (1997; Zbl 0886.62067) Full Text: DOI
Ohtani, Kazuhiro On an adjustment of degrees of freedom in the minimum mean squared error estimator. (English) Zbl 0900.62361 Commun. Stat., Theory Methods 25, No. 12, 3049-3058 (1996). MSC: 62J05 62H12 62J07 PDFBibTeX XMLCite \textit{K. Ohtani}, Commun. Stat., Theory Methods 25, No. 12, 3049--3058 (1996; Zbl 0900.62361) Full Text: DOI
Giles, Judith A.; Giles, David E. A.; Ohtani, Kazuhiro The exact risks of some pre-test and Stein-type regression estimators under balanced loss. (English) Zbl 0901.62086 Commun. Stat., Theory Methods 25, No. 12, 2901-2924 (1996). MSC: 62J07 62C99 PDFBibTeX XMLCite \textit{J. A. Giles} et al., Commun. Stat., Theory Methods 25, No. 12, 2901--2924 (1996; Zbl 0901.62086) Full Text: DOI