| make_cate | Function to calculate the Causal Treatment Effect |
| opl_dt_c | Optimal Policy Learning with Decision Tree |
| opl_dt_max_choice | User selection on multiple choice |
| opl_lc_c | Linear Combination Based Policy Learning |
| opl_tb_c | Threshold-based policy learning at specific values |
| overlapping | Testing overlap between old and new policy sample |