19. The computer program product according to claim 15 , wherein the computer readable program code is configured to apply the classifier and the calibration matrix by applying the classifier to the production dataset, thereby generating an intermediate classification, and applying the calibration matrix to the intermediate classification, thereby generating the production classification quantification.
15. A computer program product, the computer program product comprising: a non-transitory computer readable storage medium having computer readable program code embodied therewith, the computer readable program code comprising: computer readable program code configured to select a training dataset comprising training instances having respective training features; computer readable program code configured to apply a classifier to the training dataset, thereby generating a training classification that assigns, to each of the training instances, one of a plurality of categories, the classifier having an expected classification; computer readable program code configured to detect a classification bias in the training classification relative to the expected classification; computer readable program code configured to define, in response to the classification bias, a calibration matrix based on conditional probabilities of features of a production dataset given occurrences of corresponding the training features computer readable program code configured to select a production dataset comprising production instances; and computer readable program code configured to apply the classifier and the calibration matrix to the production dataset, thereby generating a production classification quantification that assigns, to each of the production instances, one of the plurality of categories.