This paper examines the properties of instrumental variables (IV) applied to models with essential heterogeneity, that is, models where responses to interventions are heterogeneous and agents adopt treatments (participate in programs) with at least partial knowledge of their idiosyncratic...

Forecasting currencies with commodity prices -- Commodity prices, commodity currencies, and global economic developments / Jan J. J. Groen and Paolo A. Pesenti -- Comments: Kalok Chan, Roberto S. Mariano -- The relationship between commodity prices and currency exchange rates: evidence from the...