What Backus, Kehoe, and Kydland did was look at how much the consumption correlates-- the movement from year to year-- correlate across countries.

巴克斯，凯赫和基德兰德做的就是,研究这些消费的相关性-,不同年份消费的相关性-,不同国家的不同运动规律。

耶鲁公开课 - 金融市场课程节选