We address the problem of choosing a portfolio of policies under “deep uncertainty.” We introduce the idea of belief dominance as a way to derive a set of non-dominated portfolios and robust individual alternatives. Our approach departs from the tradition of providing a single recommended...

When giving to one charity, individuals face two types of uncertainty, descriptive and normative. We report a between-subjects charitable-giving experiment which provides first data on normative uncertainty (n=1890). In our experiment, participants can bid for either descriptive information,...

We address the problem of choosing a portfolio of policies under "deep uncertainty." We introduce the idea of belief dominance as a way to derive a set of non-dominated portfolios and robust individual alternatives. Our approach departs from the tradition of providing a single recommended...