This function is a bias correction of the residual standard deviation under MNAR, for ui.causal
.
sigmaOLScor0(X, sigmaOLS, n, p, u, gridrho)
Covariate matrix outcome.
Residual sd from outcome regression.
Number of complete cases.
Number of covariates outcome regression.
Fitted values from propensity score regression.
Values of rho.