dd.est: Dabrowska-Doksum's estimate of theta
In sporm: Semiparametric Proportional Odds Rate Model

Description Usage Arguments Details Value Author(s) References Examples

Returns the estimate of the proportionality parameter θ of Dabrowska and Doksum (1988)

1	dd.est(x, y)

x,y

Vectors containing the data values of the two samples x1,...,xm and y1,...,yn.

See the references below.

Dabrowska-Doksum's estimate of theta

Zhong Guan <zguan@iusb.edu>

Zhong Guan and Cheng Peng (2011), "A rank-based empirical likelihood approach to two-sample proportional odds model and its goodness-of-fit", Journal of Nonparametric Statistics, to appear.

D. M. Dabrowska and K. A. Doksum (1988), Estimation and testing in a two-sample generalized odds-rate model, J. Amer. Statist. Assoc. 83 pp. 744–749.

1 2 3 4 5 6 7	# Radar tube life data z<-RadarTube$Days v<-RadarTube$Type x<-z[v==1]; y<-z[v==2] # Dabrowska-Doksum's estimate of theta dd.est(x,y) dd.est(y,x)