We axiomatize a model of decision under objective ambiguity described by multiple probability distributions. The decision maker forms a subjective (non necessarily additive) belief about the likelihood of probability distributions and computes the average expected utility of a given act with respect to this second order belief. We show that ambiguity aversion like the one revealed by the Ellsbe...

Mountain river torrents and snow avalanches generate human and material damages with dramatic consequences. Knowledge about natural phenomenona is often lacking and expertise is required for decision and risk management purposes using multi-disciplinary quantitative or qualitative approaches. Expertise is considered as a decision process based on imperfect information coming from more or less r...

In this article we propose a qualitative ( ordi­ nal) counterpart for the Partially Observable Markov Decision Processes rnodel (POMDP) in which the uncertainty, as well as the prefer­ ences of the agent, are modeled by possibility distributions. This qualitative counterpart of the POMDP model relies on a possibilistic theory of decision under uncertainty, recently developed. One advantage of s...

This paper proposes a new model, the EMDP (Evidential Markov Decision Process). It is a MDP (Markov Decision Process) for belief functions in which rewards are defined for each state transition, like in a classical MDP, whereas the transitions are modeled as in an EMC (Evidential Markov Chain), i.e. they are sets transitions instead of states transitions. The EMDP can fit to more applications t...

This essay looks at the use of vernacular web culture by new right. Specifically it focuses on how, in recent years, right appropriated a genre aesthetics known as ‘vapourwave’ to create sub-genre ‘fashwave’. Like vapourwave before it, fashwave taps into cultural imaginary that is nostalgic for an imagined ‘cyberpunk’ past future — but while former has been subject monograph (Tanner 2016), very...

Behavioral accounting research deals with a complex set of phenomenon including the broad domain of human decision making under uncertainty. Two aspects of decision making of particular relevance to accounting and auditing research are two constructs that are inexorably interrelated: uncertainty and information (evidence). This paper introduces a theoretical perspective that enriches the knowle...