EMSS                    EM type Estimation Methods for the Heckman's
                        Sample Selection Model
Smoke                   Survey Data on Smoking Behaviour
coef.EMSS               Getting Coefficients of EM type Sample
                        Selection Model Fits
confint.EMSS            Getting Confidence Intervals for Parameters of
                        EM type Sample Selection Model Fits
summary.EMSS            Summarizing EM type Sample Selection Model Fits
vcov.EMSS               Getting Variance-Covariance Matrix for
                        Parameters of EM type Sample Selection Model
                        Fits
