| Variable | Coefficient | t-statistics | Probability |
| LTm | 8.32 | 9.28 | 0.000 |
| LPrec | 0.05 | 1.69 | 0.118 |
| LPib | 0.55 | 13.96 | 0.000 |
| C | −21.98 | −6.67 | 0.000 |
| Recall force | −0.59 | −6.18 | 0.000 |
| % R2 | 91.26 |
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