  We represent preferences that exhibit absolute or relative attitudes towards
ambiguity without assuming convexity of preferences. Our analysis is motivated
by the recent experimental evidence by Baillon and Placido (2019) indicating
that ambiguity becomes more tolerable as individuals are better off overall.
Decreasing absolute ambiguity aversion is characterized by constant
superadditive certainty equivalents and admits an act-dependent variational
representation (Maccheroni et al., 2006). Decreasing relative ambiguity
aversion relates to positive superhomogeneity and admits an act-dependent
confidence preference representation (Chateauneuf and Faro, 2009). We apply our
characterizations to retrieve a classic risk sharing result on the efficiency
of trade and subjective beliefs of the individuals (Rigotti et al., 2008).
