Vague, or imprecise, news may affect decisions by changing either the fundamentals, or the associated uncertainty, or both. We show response to vague news is shaped by ambiguity attitudes, yet with qualitative differences for different levels of risk, on top of ambiguity, conveyed. The decision...

Ambiguity refers to a decision situation under uncertainty when there is incomplete information about the likelihood of events. Different formal models of this notion have been developed with differing implications about the representation of ambiguity and ambiguity aversion.