# Sample Selection Models

## Documentation for package ‘ssmodels’ version 2.0.1

- DESCRIPTION file.
- User guides, package vignettes and other documentation.
- Package NEWS.

## Help Pages

ssmodels-package | ssmodels: Sample Selection Models in R
HCinitial | Two-Step Method for Parameter Estimation of the Classical Heckman Model
HeckmanBS | Heckman-BS Model Fit Function
HeckmanCL | Classic Heckman Model Fit Function
HeckmanGe | Generalized Heckman Model Estimation
HeckmanSK | Skew-Normal Sample Selection Model Fit Function
HeckmantS | Heckman-t Model Fit Function
IMR | Inverse Mills Ratio (IMR) Calculation
MEPS2001 | Medical Expenditure Panel Survey
Mroz87 | U.S. Women's Labor Force Participation
nhanes | US National Health and Nutrition Examination Study
PSID2 | Panel Study of Income Dynamics
RandHIE | RAND Health Insurance Experiment
ssmodels | ssmodels: Sample Selection Models in R
step2 | Heckman's Two-Step Method
summary.HeckmanBS | Summary of Birnbaum-Saunders Heckman Model
summary.HeckmanCL | Summary of Classic Heckman Model
summary.HeckmanGe | Summary of Generalized Heckman Model
summary.HeckmanSK | Summary of Skew-Normal Heckman Model
summary.HeckmantS | Summary of Heckman-t Model
twostep | Two-Step Estimation of the Classic Heckman Model