Covariates (Xi)
Error Term Variances (σi)
1) U (0, 1)
a) Homoskedasticity
2) N (0, 1)
b) 
3) t3
c) 
4) log normal
d) 
5) N (0, 1)/N (0, 1)
| Covariates (Xi) | Error Term Variances (σi) |
| 1) U (0, 1) | a) Homoskedasticity |
| 2) N (0, 1) | b) |
| 3) t3 | c) |
| 4) log normal | d) |
| 5) N (0, 1)/N (0, 1) |
|