| MEPS | Healthcare expenditure data | 
| ord_curve | Ordered curve for assessing mean structures | 
| qqresid | QQ-plots of DPIT residuals | 
| resid_2pm | Residuals for regression models with two-part outcomes | 
| resid_disc | Residuals for regression models with discrete outcomes | 
| resid_quasi | Quasi Emprical residuals functions | 
| resid_semiconti | Residuals for regression models with semicontinuous outcomes | 
| resid_zeroinfl | Residuals for regression models with zero-inflated outcomes |