REFERENCES
- Wichern , D. W. and Churchill , G. A. 1978 . A comparison of ridge estimators . Technometrics , 20 : 301 – 311 .
- Vinod , H. D. 1976 . Application of new ridge regression methods to a study of Bell System scale economies . J. Amer. Statist. Assoc. , 71 : 835 – 841 .