This note introduces a new concept of core - open core, using which it shows a quasi-equilibrium existence result in an economy where consumers' preference relations are assumed to be lower semi-continuous, but not necessarily to have open lower sections nor to be open valued, such as the...

Several diagonal-based tail dependence indices have been suggested in the literature to quantify tail dependence. They have well-developed statistical inference theories but tend to underestimate tail dependence. For those problems when assessing the maximal strength of dependence is important...

Governments often provide employers with financial incentives which depend on the sets of people they hire. Studying such fiscal policies in a classical job matching framework, we provide a necessary and sufficient condition for a policy to preserve the substitute condition (for all revenue...