Draft

In the frameworks of classical decision theory and robust optimization, the quest for ro-bustness against severe uncertainty is almost synonymous with the use of Wald’s famous – some would say notorious – Maximin paradigm, or with one of its many variants (eg Savage’s Minimax Regret model). It is therefore puzzling, if not amazing, that both editions of the book on Info-Gap Decision Theory are utterly oblivious to this important paradigm. After all, Info-Gap was developed to provide a methodology that is designed especially for decision making under severe uncertainty. What is more, not only is Info-Gap claimed to be a decision theory that is designed expressly for decision in the face of severe uncertainty, it is claimed to be a new non-probabilistic theory that is radically different from all current theories for decision under uncertainty. These claims about Info-Gap are put forward in the Info-gap books without any substan-tiating analysis showing this to be the case. In other word, no analysis is provided to show how exactly is Info-Gap’s robustness model different from the numerous instances of Wald’s famous Maximin model