This paper is a follow-up to the recommendations made by Jacques Drèze, Edmond Malinvaud and colleagues in 1993 (Drèze, Malinvaud et al., 1994). The key arguments that are of interest for discussion here are paraphrased below: 'For almost 20 years now, West European unemployment has been a...

The theory of games against nature relies on complete preferences among all conceivable acts (case 1). Aumann and Drèze (Am Econ J Microecon 1(1):116,(2009) consider situations where preferences are defined only for a given set of acts (case 2).We extend these results to situations where (i)...