Before revision:  Finally, we analyze the relationship between surplus-invariant acceptance sets and loss-based and excess-invariant risk measures, which have been recently studied by Cont, Deguest, and He , and by Staum  .
After revision:  Finally, we emphasize the advantages of dealing with surplus-invariant acceptance sets and loss-based and excess-invariant risk measures, which have been recently studied by Cont, Deguest, and He , and by Staum .