Table 1.
Reference players according to their popularity layers and positions.
Table 2.
Conversion factors (CF) and cumulative conversion factors (CCF) for the players according to their popularity layers and positions.
Table 3.
Dependent and explanatory variables for estimating players’ market value.
Table 4.
Goodness-of-fit statistics for the three final models fitted using all three methods to the training set (€).
Table 5.
RMSE for all three models fitted using all three methods to the test set (€).
Table 6.
Coefficients of the statistically significant variables for the three models fitted to the data using the MLR method.
Fig 1.
Contributions of the variables of model 3 when it is fitted to the data using the GBM method.