| Area_Level_Data | Area level data | 
| Individual_Level_Data | Individual level data | 
| Realdata_Finalmodel | This function is used to estimate model parameters | 
| Simulation_Finalmodel | This function can use to estimate the model parameters using the initial values. | 
| Sim_Estpar | Calculating the estimated values for the parameters using log-likelihood function | 
| Sim_Loglik | This function calculates the value of the log-likelihood function | 
| TwoWeek | TwoWeek |