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RMT-Net: Reject-aware Multi-Task Network for Modeling Missing-not-at-random Data in Financial Credit Scoring. (arXiv:2206.00568v1 [cs.LG])
June 2, 2022, 1:11 a.m. | Qiang Liu, Yingtao Luo, Shu Wu, Zhen Zhang, Xiangnan Yue, Hong Jin, Liang Wang
cs.LG updates on arXiv.org arxiv.org
In financial credit scoring, loan applications may be approved or rejected.
We can only observe default/non-default labels for approved samples but have no
observations for rejected samples, which leads to missing-not-at-random
selection bias. Machine learning models trained on such biased data are
inevitably unreliable. In this work, we find that the default/non-default
classification task and the rejection/approval classification task are highly
correlated, according to both real-world data study and theoretical analysis.
Consequently, the learning of default/non-default can benefit from
rejection/approval. …
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