TY  - JOUR
PY  - 1991//
TI  - Estimating a multiplicative treatment effect under biased allocation
JO  - Biometrika
A1  - Robbins, Herbert
A1  - Zhang, Cun-Hui
SP  - 349
EP  - 354
VL  - 78
IS  - 2
N2  - Suppose that, given θ, x is Poisson with mean θ, while, given θ, y is Poisson with mean αθ or βθ according as treatment 1 or treatment 2 is used. Moreover, suppose that treatment 1 is used if x < a, while treatment 2 is used if x≥ a. Under this biased allocation of treatments we give consistent estimators of the two treatment effects α and β. The method also applies when x is binomial and θ is the odds on success, and to other cases.<p /> 
LA  - 
SN  - 0006-3444
UR  - http://dx.doi.org/10.1093/biomet/78.2.349
ID  - ref1
ER  -