Bradford Smith: An Econometrician Decades Ahead of His Time*
重新发掘了布拉德福德·史密斯1926年发表的论文，该论文超前地讨论了去趋势方法、永久与暂时冲击区分等现代时间序列计量经济学核心概念，但至今未被引用。
This article attempts to rehabilitate Bradford Smith, who in 1926 published a short article in the Journal of the American Statistical Association in which he considered the implications of detrending time series by either deviations-from-trend or first-differencing prior to regression. His discussion covers such topics as the permanent-transitory innovation distinction inherent in difference and trend stationary processes, common factor restrictions and general-to-specific modelling. These have all become mainstays of modern time-series econometrics, yet there does not appear to be even one reference to Smith's paper in all the years since its publication.