Arghyrou, M. G., Gregoriou, A., & Pourpourides, P. M. (2011). Risk aversion, exchange-rate uncertainty, and the law of one price: Insights from the market for online air-travel tickets. Canadian Journal of Economics / Revue Canadienne d'Économique, 44(3), 880-906. doi:10.1111/j.1540-5982.2011.01659.x