Notes, Comments and Preliminary results Feb 27 2018 Osamah Al-Khazali , Elie Bouri and David Roubaud   The impact of positive and negative macroeconomic news surprises: Gold versus Bitcoin   Abstract  Contact Information  Citation  Full Text  -  Note   May 14 2017 Elie Bouri , Imad Kachacha , Donald Lien and David Roubaud   Short- and long-run causality across the implied volatility of crude oil and agricultural commodities   Abstract  Contact Information  Citation  Full Text  -  Note   Jun 24 2013 Elie I Bouri   Correlation and Volatility of the MENA Equity Markets in Turbulent Periods, and Portfolio Implications   Abstract  Contact Information  Citation  Full Text  -  Note