Abstract
The current paper illustrates how the economic problem of strategic information transmission and choice manipulation between a sender and a decision maker hides complex scenarios that remain overlooked due to the simplifying assumptions imposed in the literature. We generalize the space of analysis, usually restricted to the reals, to an abstract product space. The information provided by the sender is encoded in a multifunction that forces the decision maker to choose according to the preference relation induced by the encoded information. Such preferences do not generally coincide with those defined in a complete information environment. We also provide sufficient conditions for the corresponding utility functions to be continuous. Our results imply that the ad hoc assumptions imposed in the economic literature do not suffice to prevent choice manipulation.