A Comparison of Alternative Estimators for Revised Monthly Import Statistics
描述了进口结转问题和修订月度进口水平的估计量，提出了两种替代估计量，并研究了它们的性能以及由此得出的月度变化估计量。
Abstract The import carryover problem and the estimator of revised monthly import level are described. Two alternative estimators are developed. The performance of these estimators and the estimators of month-to-month change derived from them are investigated. KEY WORDS: Exponential smoothingShort time series