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| Variable | IWC | UWC | ||
|---|---|---|---|---|
| SCAD | LASSO | SCAD | LASSO | |
| X1 | – | – | – | – |
| – | – | – | – | |
| X2 | -0.0297 | -0.0375 | – | – |
| (0.0021) | (0.0013) | – | – | |
| X3 | -0.0061 | -0.0098 | -0.0023 | -0.0023 |
| (0.0001) | (0.0010) | (0.0003) | (0.0003) | |
| X4 | 0.0866 | 0.1222 | 0.0278 | 0.0278 |
| (0.0003) | (0.0025) | (0.0015) | (0.0015) | |
| X5 | – | – | – | – |
| – | – | – | – | |
| X6 | -0.0011 | -0.0017 | – | – |
| (0.0000) | (0.000) | – | – | |
| X7 | 0.0070 | – | 0.0163 | 0.0163 |
| (0.0000) | – | (0.0000) | (0.0000) | |
