they lack an internal structure that limits the set of possible alternatives.

Many choices in real life situations depart substantially from this simple setting. Choices are often made among bundles of interdependent elements. These bundles may be formed in a variety of ways, which in turn affect the selection process of a social outcome. For instance, in the typical textbook example of social choice, where a group of friends decides what to do for the evening, the choice set is {movie, concert, restaurant, dinner at home,…}. However, at a closer scrutiny, these alternatives are neither primitive nor exogenously given, because they are labels for bundles of elements (e.g. with whom, where, when,…) and the preferences are unlikely to be expressed before the labels get specified in their constituting elements. Moreover, a member of the group could easily obtain a social outcome close to the one he or she prefers by carefully crafting the objects and possibly designing a new set of objects. Other examples can be candidates and parties in political elections (which stand for complex bundles of interdependent policies and personality traits) or packages of policies on which committees and boards are called upon to decide.

In [@MarengoSette] Marengo 