This paper analyzes how insurance companies allow the issue of market incompleteness to be overcome. A general equilibrium economy is considered in which heterogeneous agents face endowment risks. Markets are incomplete: there are only markets for trading commodities ex-post and hedging price...

Die Problematik der Ungewissheit hat sich zu einem zentralen theoretischen Ausgangspunkt wirtschaftssoziologischer Forschung entwickelt. Das Papier diskutiert die Frage, inwieweit Ungewissheit tatsächlich als paradigmatischer Ansatzpunkt zur Untersuchung wirtschaftlicher Phänomene aus...

There is a general presumption that social preferences can be ignored if markets are competitive. Market experiments (Smith 1962) and recent theoretical results (Dufwenberg et al. 2008) suggest that competition forces people to behave as if they were purely self-interested. We qualify this view....