mcm                     Estimate and Test Inter-generational Social
                        Mobility Effect on an Outcome
mcm_lmer                Estimate and Test Inter-generational Mobility
                        Effect with Longitudinal Data
sim_datlmer             Simulated Data Studying Social Mobility
                        (Longitudinal)
sim_moderate_het        Simulated Data Studying Social Mobility
                        (Cross-Sectional)
