Results (
Thai) 2:
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First, to examine the robustness of the increase in prediction
accuracy measured by increases in the accuracy ratio, we conduct
a cross-validation simulation. In each simulation run we randomly
split the sample in two equally large parts, the calibration and the
prediction set. The calibration set is used to fit the above mentioned
two models. We then calculate the accuracy ratios for both
models, separately for the calibration set (in-the-sample) and prediction
set (out-of-the-sample). Using these accuracy ratios, we obtain
two differences in prediction accuracy between the full and
baseline model, one in-the-sample and one out-of-the-sample.
This procedure is repeated for 1000 simulation runs. The mean of
the in-the-sample differences is 19.59 percentage points, while
the mean of the out-of-the-sample differences is even higher with
21.63 percentage points. We conclude that the value of business
credit information is robust and confirmed by the out-of-the-sample
analysis.
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