Before revision:  We propose an extension, Augmented SCM , which uses an outcome model to estimate the bias due to covariate imbalance and then de-biases the original SCM estimate , analogous to bias correction for inexact matching.
After revision:  We propose Augmented SCM to extend SCM to settings where such pre-treatment fit is infeasible. Analogous to bias correction for inexact matching, Augmented SCM uses an outcome model to estimate the bias due to covariate imbalance and then de-biases the original SCM estimate , analogous to bias correction for inexact matching.