Random effects | |||||
 | Variance | Standard Deviation |  | ||
 Focal ID | 0.06 | 0.25 |  | ||
Fixed effects | Â | ||||
 | Estimate | Standard Error | Z value | P value | VIF |
  (Intercept) | 0.79 | 0.13 | 5.93 |  < 0.05 |  |
 Journal impact factor | 0.25 | 0.03 | 7.14 |  < 0.05 | 1.05 |
 Article age | 0.10 | 0.01 | 17.02 |  < 0.05 | 1.05 |