2020

Empirical or Invariant Risk Minimization? A Sample Complexity Perspective

Ahuja, Kartik, Wang, Jun, Dhurandhar, Amit et al.

Understand

Recently, invariant risk minimization (IRM) was proposed as a promising solution to address out-of-distribution (OOD) generalization.

  • However, it is unclear when IRM should be preferred over the widely-employed empirical risk minimization (ERM) framework.
  • In this work, we analyze both these frameworks from the perspective of sample complexity, thus taking a firm step towards answering this important question.
  • We find that depending on the type of data generation mechanism, the two approaches might have very different finite sample and asymptotic behavior.

Reading the bibliography…