Just Train Twice: Improving Group Robustness
                without Training Group Information

    Evan Zheran Liu * 1 Behzad Haghgoo * 1 Annie S. Chen * 1 Aditi Raghunathan 1 Pang Wei Koh 1
                Shiori Sagawa 1 Percy Liang 1 Chelsea Finn 1

             Abstract                 can be especially pronounced in the presence of spurious
   Standard training via empirical risk minimization      correlations. For example, in the task of classifying whether
   (ERM) can produce models th ...