References
- Bock , M.E. , Yancey , T.A. and Judge , G.G. 1973 . The statistical consequences of preliminary test estimators in regression . J. Amer. Statist, Assoc , 68 : 109 – 116 .
- Han , C.P. and Bancroft , T.A. 1978 . Estimating regression coefficients under conditional specification . Commun, Statist , A7 ( 1 )