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季节调整方法在CPI指数中的应用 被引量:12

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摘要 文章首先对季节调整方法的发展及应用进行了说明,着重介绍了国际上使用最广泛的两种方法:X-12-ARIMA和TRAMO/SEATS;然后用X-12-ARIMA方法对我国居民消费价格指数序列进行了季节调整,探测了交易日、闰年、异常值和春节对CPI指数的影响,比较了三种季节调整模型之间的优劣并进行调整,得出了我国CPI指数只受春节因素的影响的结论,相应的最优模型也是春节效应模型;最后用这种模型对我国CPI指数进行季节调整,分离出趋势成分、季节成分和不规则成分,得到了最终的季节调整序列。
出处 《统计与决策》 CSSCI 北大核心 2011年第2期4-8,共5页 Statistics & Decision
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