Nataša Krejić

Tax Evasion Risk Management Using a Hybrid Unsupervised Outlier Detection Method

2021 · arXiv (Cornell University)

Big data methods are becoming an important tool for tax fraud detection around the world. Unsupervised learning approach is the dominant framework due to the lack of label and ground truth in corresponding data sets …

A stochastic first-order trust-region method with inexact restoration for finite-sum minimization

2021 · arXiv (Cornell University)

We propose a stochastic first-order trust-region method with inexact function and gradient evaluations for solving finite-sum minimization problems. Using a suitable reformulation of the given problem, our method combines the inexact restoration approach for constrained …