Before revision:  Motivated by extreme individualized treatment effect estimates of the DR-learner method, we propose the normalized DR-learner  to address this issue  .
After revision:  Motivated by extreme individualized treatment effect estimates of the DR-learner method, we propose the normalized DR-learner to address this issue . The NDR-learner acknowledges that individualized effect estimates can be stabilized by an individualized normalization of inverse probability weights .