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...

The constraints that external linkages impose on domestic policy choices in Saudi Arabia have continuously evolved over the past four decades. This paper argues that two major ongoing developments in particular have affected and will continue to affect policy trade-offs. First, growing oil needs...