A duration model based on the time on Unemployment Insurance (UI) benefits instead of amodel based on the time till re-employment is more relevant from a cost-benefit perspective.The contribution of this paper is to extend the standard (mixed) Proportional Hazard model toaccount for an upper...

"Are natural resources a blessing or a curse? Bravo-Ortega and De Gregorio present a model in which natural resources have a positive effect on the level of income and a negative effect on its growth rate. The positive and permanent effect on income implies a welfare gain. There is a growth...