Models of choice over menus aim at capturing the effect of some behavioral or non-standard element of decision-making on the behavior of a single decision-maker. These models are usually compared with the standard model of choice over menus, in which the decision-maker chooses a menu whose best item is better than that of all other available ones. However, in many empirical settings such as experimental studies, choice data come from a population of decision-makers with possibly heterogeneous attitudes and tastes. This (...) heterogeneity can make the observed choices over menus stochastic. This fact calls for a stochastic characterization of models of choice over menus to be able to better compare and contrast different models empirically. In this paper, I do this task for the standard model, which would be an extension of the random utility model to the realm of choice over menus. In particular, I provide the necessary and sufficient conditions, i.e., axioms on choice data over menus for it to be consistent with a population of decision-makers each of whom behaves according to the standard model. The axioms that characterize the model are the axiom of revealed stochastic preferences over singletons and three rationality axioms. (shrink)

This research endeavors to introduce a novel concept in ethics, namely ethics based on the primacy of existence, drawing upon Aṣālat al-wujūd, the theory of the primacy of existence in ontology. Mullā Sadrā's philosophy, which has three basic tenets—the primacy of existence, substantial motion (Ḥarakat-i Juharī), and gradation in existence (Tashkīk-i wujūd)—is the basis for this doctrine. The primacy of existence holds that quiddity is a mental construct and that existence is fundamental. The writers distinguished between two conceptions of ethics (...) in this regard: one based on existence and the other on quiddity. Human quiddity is fixed and does not grade, hence ethics based on quiddity's primacy will always be fixed and the same for every individual. Moral obligations are universal and shared by all individuals. On the other hand, moral obligations for humans might vary depending on their existential status, according to ethics grounded in the primacy of existence. Moral oughts and ought nots are established by human existential grades in this ethics. This ethical model is flexible and dynamic. (shrink)