  This note shows that the value of ambiguous persuasion characterized in
Beauchene, Li and Li(2019) can be given by a concavification program as in
Bayesian persuasion (Kamenica and Gentzkow, 2011). In addition, it implies that
an ambiguous persuasion game can be equivalently formalized as a Bayesian
persuasion game by distorting the utility functions. This result is obtained
under a novel construction of ambiguous persuasion.
