Unemployment insurance has been the subject of numerous theoretical and empirical studies. These studies elucidate the benefits and the cost of unemployment insurance, namely, the improved allocation of risk bearing and the reduced incentives for work. In the past two decades a branch of the...

This article introduces a new approach to modeling the expanding universe of decision makers in the wake of growing awareness, and invokes the axiomatic approach to model the evolution of decision makers' beliefs as awareness grows. The expanding universe is accompanied by extension of the set...