There are few areas of economic policy-making in which the returns to good decisions are so high-and the punishment of bad decisions so cruel-as in the management of natural resource wealth. Rich endowments of oil, gas and minerals have set some countries on courses of sustained and robust...

In most macroeconomic models, the substitutability between domestic and foreign goods is calibrated using aggregated data. This imposes homogeneous elasticities across goods, and the calibration is only valid under this assumption. If elasticities are heterogeneous, the aggregate...