“…The recent literature has provided three competing theories to explain the pervasive increase in agricultural and industrial commodity prices, as outlined by Frankel and Rose (2009): (i) global demand growth; (ii) destabilizing financial speculation; and (iii) accommodative monetary policy. Notwithstanding the continuing debate over the nature of price volatility, a plethora of recent studies has emphasized macroeconomic factors as the main determinants of crude oil prices over the last decade (Belke, Bordon, and Hendricks, 2010;Hamilton, 2009;Kilian, 2009;Thomas, Mühleisen and Pant, 2010;and Wirl, 2008). On the other hand, most empirical research tends to explain the formation of wine prices with supply-side factors such as climatic conditions, grape quality, age effects, and external quality ratings (Cardebat and Figuet, 2004;Gergaud, 1999;Jones and Storchmann, 2001;and Lecocq and Visser, 2006).…”