A new approach is presented. It is based on a generalization of a breach of a term of contract and on the economic uncertainty principle. Problems, which can be solved, research fields, which can be augmented or created, and fields of applications in practical economy are reviewed. The role of...

The concept of unforeseen events is considered as a part of a hypothesis of uncertain future. The applications of the consequences of the hypothesis in utility and prospect theories are reviewed. Partially unforeseen events and their role in forecasting are analyzed. Preliminary preparations are...